9 (nine) is the
natural number
In mathematics, the natural numbers are those numbers used for counting (as in "there are ''six'' coins on the table") and ordering (as in "this is the ''third'' largest city in the country").
Numbers used for counting are called '' cardinal ... following and preceding .
Evolution of the Arabic digit
In the
beginning , various Indians wrote a digit 9 similar in shape to the modern closing
question mark
The question mark (also known as interrogation point, query, or eroteme in journalism) is a punctuation mark that indicates an interrogative clause or phrase in many languages.
History
In the fifth century, Syriac Bible manuscripts used ... without the bottom dot. The Kshatrapa, Andhra and Gupta started curving the bottom vertical line coming up with a -look-alike. The Nagari continued the bottom stroke to make a circle and enclose the 3-look-alike, in much the same way that the sign @ encircles a lowercase ''a''. As time went on, the enclosing circle became bigger and its line continued beyond the circle downwards, as the 3-look-alike became smaller. Soon, all that was left of the 3-look-alike was a squiggle. The Arabs simply connected that squiggle to the downward stroke at the middle and subsequent European change was purely cosmetic.
While the shape of the glyph for the digit 9 has an
ascender in most modern
typeface
A typeface (or font family) is the design of lettering that can include variations in size, weight (e.g. bold), slope (e.g. italic), width (e.g. condensed), and so on. Each of these variations of the typeface is a font.
There are thousands ... s, in typefaces with
text figures
Text figures (also known as non-lining, lowercase, old style, ranging, hanging, medieval, billing, or antique figures or numerals) are numerals designed with varying heights in a fashion that resembles a typical line of running text, hence the ... the character usually has a
descender
In typography and handwriting, a descender is the portion of a letter that extends below the baseline of a font.
For example, in the letter ''y'', the descender is the "tail", or that portion of the diagonal line which lies below the ''v'' ... , as, for example, in
.
The modern digit resembles an inverted ''6''. To disambiguate the two on objects and documents that can be inverted, they are often underlined. Another distinction from the 6 is that it is sometimes handwritten with two strokes and a straight stem, resembling a raised lower-case letter q.
In a
seven-segment display
A seven-segment display is a form of electronic display device for displaying decimal numerals that is an alternative to the more complex dot matrix displays.
Seven-segment displays are widely used in digital clocks, electronic meters, basic ... , the number 9 can be constructed in two ways, either with a hook at the end of its stem or without one. Most
LCD
A liquid-crystal display (LCD) is a flat-panel display or other electronically modulated optical device that uses the light-modulating properties of liquid crystals combined with polarizers. Liquid crystals do not emit light directly but in ... calculators use the former, but some
VFD models use the latter.
Mathematics
Nine is the fourth
composite number
A composite number is a positive integer that can be formed by multiplying two smaller positive integers. Equivalently, it is a positive integer that has at least one divisor other than 1 and itself. Every positive integer is composite, prime, ... , and the first composite number that is odd. 9 is the highest single-digit number in the
decimal system . It is the third
square number
In mathematics, a square number or perfect square is an integer that is the square of an integer; in other words, it is the product of some integer with itself. For example, 9 is a square number, since it equals and can be written as .
The u ... (3
2 ), and the second non-unitary square
prime
A prime number (or a prime) is a natural number greater than 1 that is not a product of two smaller natural numbers. A natural number greater than 1 that is not prime is called a composite number. For example, 5 is prime because the only way ... of the form ''p''
2 and first that is odd, with all subsequent squares of this form odd as well.
By
Mihăilescu's theorem , 9 is the only positive
perfect power
In mathematics, a perfect power is a natural number that is a product of equal natural factors, or, in other words, an integer that can be expressed as a square or a higher integer power of another integer greater than one. More formally, ''n' ... that is one more than another positive perfect power, since the
square
In Euclidean geometry, a square is a regular quadrilateral, which means that it has four equal sides and four equal angles (90-degree angles, π/2 radian angles, or right angles). It can also be defined as a rectangle with two equal-length a ... of 3 is one more than the
cube
In geometry, a cube is a three-dimensional solid object bounded by six square faces, facets or sides, with three meeting at each vertex. Viewed from a corner it is a hexagon and its net is usually depicted as a cross.
The cube is the on ... of 2.
A number that is 4 or 5
modulo
In computing, the modulo operation returns the remainder or signed remainder of a division, after one number is divided by another (called the '' modulus'' of the operation).
Given two positive numbers and , modulo (often abbreviated as ) is t ... 9 cannot be represented as the
sum of three cubes .
9 is a
Motzkin number , for the number of ways of drawing non-intersecting
chords
Chord may refer to:
* Chord (music), an aggregate of musical pitches sounded simultaneously
** Guitar chord a chord played on a guitar, which has a particular tuning
* Chord (geometry), a line segment joining two points on a curve
* Chord ... between four points on a
circle
A circle is a shape consisting of all points in a plane that are at a given distance from a given point, the centre. Equivalently, it is the curve traced out by a point that moves in a plane so that its distance from a given point is const ... .
Since , 9 is an
exponential factorial .
Six recurring nines appear in the decimal places 762 through 767 of
. (See
six nines in pi ).
The first non-trivial
magic square
In recreational mathematics, a square array of numbers, usually positive integers, is called a magic square if the sums of the numbers in each row, each column, and both main diagonals are the same. The 'order' of the magic square is the number ... is a
3 x
3 magic square made of nine cells, with a
magic constant of 15; there are no
2 x
2 magic squares with four cells. Meanwhile, a
9 x
9 magic square has a magic constant of
369 .
A
polygon
In geometry, a polygon () is a plane figure that is described by a finite number of straight line segments connected to form a closed '' polygonal chain'' (or ''polygonal circuit''). The bounded plane region, the bounding circuit, or the two t ... with nine sides is called a
nonagon . Also an ''enneagon'', it is able to fill a
plane-vertex alongside an
equilateral triangle and an regular
octadecagon , or 18-sided
polygon
In geometry, a polygon () is a plane figure that is described by a finite number of straight line segments connected to form a closed '' polygonal chain'' (or ''polygonal circuit''). The bounded plane region, the bounding circuit, or the two t ... .
There are nine distinct
uniform coloring s of the
triangular tiling and the
square tiling , which are the two simplest
regular tilings
This article lists the regular polytopes and regular polytope compounds in Euclidean, spherical and hyperbolic spaces.
The Schläfli symbol describes every regular tessellation of an ''n''-sphere, Euclidean and hyperbolic spaces. A Schläf ... ; the
hexagonal tiling
In geometry, the hexagonal tiling or hexagonal tessellation is a regular tiling of the Euclidean plane, in which exactly three hexagons meet at each vertex. It has Schläfli symbol of or (as a truncated triangular tiling).
English mathema ... , on the other hand, has three distinct uniform colorings.
There are nine
edge-transitive convex polyhedra in
three dimensions :
*the five
regular Platonic solids : the
tetrahedron
In geometry, a tetrahedron (plural: tetrahedra or tetrahedrons), also known as a triangular pyramid, is a polyhedron composed of four triangular faces, six straight edges, and four vertex corners. The tetrahedron is the simplest of all the ... ,
octahedron ,
cube
In geometry, a cube is a three-dimensional solid object bounded by six square faces, facets or sides, with three meeting at each vertex. Viewed from a corner it is a hexagon and its net is usually depicted as a cross.
The cube is the on ... ,
dodecahedron and
icosahedron ;
*the two
quasiregular Archimedean solid s: the
cuboctahedron and the
icosidodecahedron ; and
*two
Catalan solid s: the
rhombic dodecahedron and the
rhombic triacontahedron , which are
duals
''Duals'' is a compilation album by the Irish rock band U2. It was released in April 2011 to u2.com subscribers.
Track listing
:* "Where the Streets Have No Name" and "Amazing Grace" are studio mix of U2's performance at the Rose Bowl, ... to the only two quasiregular polyhedra.
In
four-dimensional space , there are nine
paracompact hyperbolic honeycomb
Coxeter group s, as well as nine
regular compact hyperbolic honeycombs from regular
convex
Convex or convexity may refer to:
Science and technology
* Convex lens, in optics
Mathematics
* Convex set, containing the whole line segment that joins points
** Convex polygon, a polygon which encloses a convex set of points
** Convex polytop ... and
star
A star is an astronomical object comprising a luminous spheroid of plasma held together by its gravity. The nearest star to Earth is the Sun. Many other stars are visible to the naked eye at night, but their immense distances from Earth make ... ''
polychora
In geometry, a 4-polytope (sometimes also called a polychoron, polycell, or polyhedroid) is a four-dimensional polytope. It is a connected and closed figure, composed of lower-dimensional polytopal elements: vertices, edges, faces ( polygons), ... ''. There are also nine uniform
demitesseractic (
\mathrm D_ )
Euclidean honeycombs in the fourth dimension.
There are only three types of
Coxeter groups of
uniform figures in dimensions
nine and thereafter, aside from the many families of
prisms and
proprism s: the
\mathrm A_ simplex
In geometry, a simplex (plural: simplexes or simplices) is a generalization of the notion of a triangle or tetrahedron to arbitrary dimensions. The simplex is so-named because it represents the simplest possible polytope in any given dimension ... groups, the
\mathrm B_ hypercube
In geometry, a hypercube is an ''n''-dimensional analogue of a square () and a cube (). It is a closed, compact, convex figure whose 1-skeleton consists of groups of opposite parallel line segments aligned in each of the space's dimensions ... groups, and the
\mathrm D_ demihypercube groups. The
ninth dimension is also the final dimension that contains
Coxeter-Dynkin diagram s as
uniform solutions in
hyperbolic space
In mathematics, hyperbolic space of dimension n is the unique simply connected, n-dimensional Riemannian manifold of constant sectional curvature equal to -1. It is homogeneous, and satisfies the stronger property of being a symmetric space. ... . Inclusive of compact hyperbolic solutions, there are a total of 238
compact and paracompact Coxeter-Dynkin diagrams between dimensions two and nine, or equivalently between ranks three and ten. The most important of the last
_9 paracompact groups is the group
_9 with
1023
Year 1023 ( MXXIII) was a common year starting on Tuesday (link will display the full calendar) of the Julian calendar.
Events
By place
Europe
* The Judge-Governor of Seville in Al-Andalus (modern Spain) takes advantage of the disinte ... total honeycombs, the simplest of which is
621 whose
vertex figure is the
521 honeycomb : the vertex arrangement of the densest-possible packing of spheres in
8 dimensions which forms the
\mathbb E_ lattice. The 6
21 honeycomb is made of
9-simplex es and
9-orthoplex es, with 1023 total
polytope elements making up each 9-simplex. It is the final honeycomb figure with infinite facets and vertex figures in the k
21 family of
semiregular polytope s, first defined by
Thorold Gosset in 1900.
There are nine
Heegner number s, or
square-free positive integer s
n that yield an imaginary
quadratic field \Q\left sqrt\right /math> whose ring of integers
In mathematics, the ring of integers of an algebraic number field K is the ring of all algebraic integers contained in K. An algebraic integer is a root of a monic polynomial with integer coefficients: x^n+c_x^+\cdots+c_0. This ring is often d ... unique factorization , or class number of 1.
In decimal
A positive number is divisible by nine if and only if
In logic and related fields such as mathematics and philosophy, "if and only if" (shortened as "iff") is a biconditional logical connective between statements, where either both statements are true or both are false.
The connective is bi ... digital root is nine. That is, if any natural number
In mathematics, the natural numbers are those numbers used for counting (as in "there are ''six'' coins on the table") and ordering (as in "this is the ''third'' largest city in the country").
Numbers used for counting are called '' cardinal ... base-''N'' , the divisor
In mathematics, a divisor of an integer n, also called a factor of n, is an integer m that may be multiplied by some integer to produce n. In this case, one also says that n is a multiple of m. An integer n is divisible or evenly divisible by ... Kaprekar number .
The difference between a base-10 positive integer and the sum of its digits is a whole multiple of nine. Examples:
*The sum of the digits of 41 is 5, and 41 − 5 = 36. The digital root of 36 is 3 + 6 = 9, which, as explained above, demonstrates that it is divisible by nine.
*The sum of the digits of 35967930 is 3 + 5 + 9 + 6 + 7 + 9 + 3 + 0 = 42, and 35967930 − 42 = 35967888. The digital root of 35967888 is 3 + 5 + 9 + 6 + 7 + 8 + 8 + 8 = 54, 5 + 4 = 9.
If dividing a number by the amount of 9s corresponding to its number of digits, the number is turned into a repeating decimal
A repeating decimal or recurring decimal is decimal representation of a number whose digits are periodic (repeating its values at regular intervals) and the infinitely repeated portion is not zero. It can be shown that a number is rational i ... Casting out nines is a quick way of testing the calculations of sums, differences, products, and quotients of integers known as long ago as the 12th century.
List of basic calculations
Alphabets and codes
*In the NATO phonetic alphabet
The (International) Radiotelephony Spelling Alphabet, commonly known as the NATO phonetic alphabet, is the most widely used set of clear code words for communicating the letters of the Roman alphabet, technically a ''radiotelephonic spellin ... produce PLU codes that begin with 9 are organic .
Culture and mythology
Indian culture
Nine is a number that appears often in Indian culture and mythology. Some instances are enumerated below.
*Nine influencers are attested in Indian astrology .
*In the Vaisheshika branch of Hindu philosophy
Hindu philosophy encompasses the philosophies, world views and teachings of Hinduism that emerged in Ancient India which include six systems ('' shad-darśana'') – Samkhya, Yoga, Nyaya, Vaisheshika, Mimamsa and Vedanta.Andrew Nicholson ... Earth
Earth is the third planet from the Sun and the only astronomical object known to harbor life. While large volumes of water can be found throughout the Solar System, only Earth sustains liquid surface water. About 71% of Earth's surf ... Water
Water (chemical formula ) is an inorganic, transparent, tasteless, odorless, and nearly colorless chemical substance, which is the main constituent of Earth's hydrosphere and the fluids of all known living organisms (in which it acts as ... Air , Fire
Fire is the rapid oxidation of a material (the fuel) in the exothermic chemical process of combustion, releasing heat, light, and various reaction Product (chemistry), products.
At a certain point in the combustion reaction, called the ignition ... Ether
In organic chemistry, ethers are a class of compounds that contain an ether group—an oxygen atom connected to two alkyl or aryl groups. They have the general formula , where R and R′ represent the alkyl or aryl groups. Ethers can again b ... Time
Time is the continued sequence of existence and events that occurs in an apparently irreversible succession from the past, through the present, into the future. It is a component quantity of various measurements used to sequence events, t ... Space
Space is the boundless three-dimensional extent in which objects and events have relative position and direction. In classical physics, physical space is often conceived in three linear dimensions, although modern physicists usually con ... Soul
In many religious and philosophical traditions, there is a belief that a soul is "the immaterial aspect or essence of a human being".
Etymology
The Modern English noun '':wikt:soul, soul'' is derived from Old English ''sāwol, sāwel''. The ea ... Mind
The mind is the set of faculties responsible for all mental phenomena. Often the term is also identified with the phenomena themselves. These faculties include thought, imagination, memory, will, and sensation. They are responsible for vario ... Navaratri is a nine-day festival dedicated to the nine forms of Durga .
* Navaratna , meaning "nine jewels" may also refer to Navaratnas – accomplished courtiers, Navratan – a kind of dish, or a form of architecture
Architecture is the art and technique of designing and building, as distinguished from the skills associated with construction. It is both the process and the product of sketching, conceiving, planning, designing, and constructing buildings ... Indian aesthetics , there are nine kinds of Rasa .
Chinese culture
*Nine ( pinyin
Hanyu Pinyin (), often shortened to just pinyin, is the official romanization system for Standard Mandarin Chinese in China, and to some extent, in Singapore and Malaysia. It is often used to teach Mandarin, normally written in Chinese fo ... number in Chinese culture because it sounds the same as the word "long-lasting" ( pinyin
Hanyu Pinyin (), often shortened to just pinyin, is the official romanization system for Standard Mandarin Chinese in China, and to some extent, in Singapore and Malaysia. It is often used to teach Mandarin, normally written in Chinese fo ... Chinese dragon
The Chinese dragon, also known as ''loong'', ''long'' or ''lung'', is a legendary creature in Chinese mythology, Chinese folklore, and Chinese culture at large. Chinese dragons have many Outline of life forms, animal-like forms such as Bixi (my ... yang (masculine, heavenly) and 36 yin
Yin may refer to:
*the dark force in the yin and yang from traditional Chinese philosophy and medicine
*Yīn (surname) (), a Chinese surname
*Yǐn (surname) (), a Chinese surname
*Shang dynasty, also known as the Yin dynasty
**Yinxu or Yin, the S ... digital root of 9.
*The dragon often symbolizes the Emperor
An emperor (from la, imperator, via fro, empereor) is a monarch, and usually the sovereign ruler of an empire or another type of imperial realm. Empress, the female equivalent, may indicate an emperor's wife ( empress consort), mother ( e ... Forbidden City
The Forbidden City () is a palace complex in Dongcheng District, Beijing, China, at the center of the Imperial City of Beijing. It is surrounded by numerous opulent imperial gardens and temples including the Zhongshan Park, the sacrific ... Temple of Heaven
The Temple of Heaven () is a complex of imperial religious buildings situated in the southeastern part of central Beijing. The complex was visited by the Emperors of the Ming and Qing dynasties for annual ceremonies of prayer to Heaven for a g ... Kowloon '' in Hong Kong literally means: ''nine dragons ''.
*The nine-dotted line () delimits certain island claims by China in the South China Sea.
*The nine-rank system
The nine-rank system, also known as the nine-grade controller system, was used to categorize and classify government officials in Imperial China. Created in the state of Cao Wei during the Three Kingdoms, it was used until the Song dynasty, and si ... Heart
The heart is a muscular organ found in most animals. This organ pumps blood through the blood vessels of the circulatory system. The pumped blood carries oxygen and nutrients to the body, while carrying metabolic waste such as carbon diox ... Heal ) / Heart Master (Immortality
Immortality is the concept of eternal life. Some modern species may possess biological immortality.
Some scientists, futurists, and philosophers have theorized about the immortality of the human body, with some suggesting that human immort ... Traditional Chinese Medicine
Traditional Chinese medicine (TCM) is an alternative medicine, alternative medical practice drawn from traditional medicine in China. It has been described as "fraught with pseudoscience", with the majority of its treatments having no logica ... Ancient Egypt
*The nine bows is a term used in Ancient Egypt to represent the traditional enemies of Egypt.
*The Ennead
The Ennead or Great Ennead was a group of nine deities in Egyptian mythology worshipped at Heliopolis: the sun god Atum; his children Shu and Tefnut; their children Geb and Nut; and their children Osiris, Isis, Set, and Nephthys. The E ... Osiris myth , judged whether Horus
Horus or Heru, Hor, Har in Ancient Egyptian, is one of the most significant ancient Egyptian deities who served many functions, most notably as god of kingship and the sky. He was worshipped from at least the late prehistoric Egypt until the P ... Set should inherit Egypt.
European culture
*The Nine Worthies are nine historical, or semi-legendary figures who, in the Middle Ages, were believed to personify the ideals of chivalry.
*In Norse mythology
Norse, Nordic, or Scandinavian mythology is the body of myths belonging to the North Germanic peoples, stemming from Old Norse religion and continuing after the Christianization of Scandinavia, and into the Nordic folklore of the modern peri ... nine worlds which are all connected by the world tree Yggdrasil
Yggdrasil (from Old Norse ), in Norse cosmology, is an immense and central sacred tree. Around it exists all else, including the Nine Worlds.
Yggdrasil is attested in the '' Poetic Edda'' compiled in the 13th century from earlier tradition ... Norse mythology
Norse, Nordic, or Scandinavian mythology is the body of myths belonging to the North Germanic peoples, stemming from Old Norse religion and continuing after the Christianization of Scandinavia, and into the Nordic folklore of the modern peri ... Odin , as that is how many days he hung from the world tree Yggdrasil
Yggdrasil (from Old Norse ), in Norse cosmology, is an immense and central sacred tree. Around it exists all else, including the Nine Worlds.
Yggdrasil is attested in the '' Poetic Edda'' compiled in the 13th century from earlier tradition ... runes
Runes are the letters in a set of related alphabets known as runic alphabets native to the Germanic peoples. Runes were used to write various Germanic languages (with some exceptions) before they adopted the Latin alphabet, and for specialised ... Greek mythology
*The nine Muse
In ancient Greek religion and mythology, the Muses ( grc, Μοῦσαι, Moûsai, el, Μούσες, Múses) are the inspirational goddesses of literature, science, and the arts. They were considered the source of the knowledge embodied in the ... Calliope (epic poetry), Clio (history), Erato
In Greek mythology, Erato (; grc, Ἐρατώ) is one of the Greek Muses, which were inspirational goddesses of literature, science, and the arts. The name would mean "desired" or "lovely", if derived from the same root as Eros, as Apollonius ... Euterpe (lyric poetry), Melpomene (tragedy), Polyhymnia (song), Terpsichore (dance), Thalia (comedy), and Urania (astronomy).
*It takes nine days (for an anvil) to fall from heaven to earth, and nine more to fall from earth to Tartarus
In Greek mythology, Tartarus (; grc, , }) is the deep abyss that is used as a dungeon of torment and suffering for the wicked and as the prison for the Titans. Tartarus is the place where, according to Plato's ''Gorgias'' (), souls are judg ... Leto labored for nine days and nine nights for Apollo
Apollo, grc, Ἀπόλλωνος, Apóllōnos, label=genitive , ; , grc-dor, Ἀπέλλων, Apéllōn, ; grc, Ἀπείλων, Apeílōn, label=Arcadocypriot Greek, ; grc-aeo, Ἄπλουν, Áploun, la, Apollō, la, Apollinis, label= ... Homeric Hymn to Delian Apollo .
Mesoamerican mythology
* The Lords of the Night , is a group of nine deities who each ruled over every ninth night forming a calendrical cycle
Aztec mythology
* Mictlan the underworld in Aztec mythology, consists of nine levels.
Mayan mythology
* The Mayan underworld Xibalba consists of nine levels.
* El Castillo the Mayan step-pyramid in Chichén Itzá , consists of nine steps. It is said that this was done to represent the nine levels of Xibalba .
Anthropology
Idioms
*"to go the whole nine yards-"
*"A cat-o'-nine-tails
The cat o' nine tails, commonly shortened to the cat, is a type of multi-tailed whip or flail that originated as an implement for severe physical punishment, notably in the Royal Navy and British Army, and as a judicial punishment in Britain ... Robert Ripley .
*"A cat has nine lives"
*"to be on cloud nine"
*"A stitch in time saves nine"
*"found true 9 out of 10 times"
*"possession is nine tenths of the law"
*The word "K-9" pronounces the same as ''canine'' and is used in many US police departments to denote the police dog unit. Despite not sounding like the translation of the word ''canine'' in other languages, many police and military units around the world use the same designation.
*Someone dressed "to the nines" is dressed up as much as they can be.
*In North American urban culture
Urban culture is the culture of towns and cities. The defining theme is the presence of a great number of very different people in a very limited space - most of them are strangers to each other but still try to be polite to each other more times ... 9mm pistol
A pistol is a handgun, more specifically one with the chamber integral to its gun barrel, though in common usage the two terms are often used interchangeably. The English word was introduced in , when early handguns were produced in Europe, ... homicide
Homicide occurs when a person kills another person. A homicide requires only a volitional act or omission that causes the death of another, and thus a homicide may result from accidental, reckless, or negligent acts even if there is no inten ... Society
*'' The 9 on Yahoo! '', hosted by Maria Sansone , was a daily video compilation show, or vlog, on Yahoo! featuring the nine top "web finds" of the day.
*Nine justices sit on the United States Supreme Court
The Supreme Court of the United States (SCOTUS) is the highest court in the federal judiciary of the United States. It has ultimate appellate jurisdiction over all U.S. federal court cases, and over state court cases that involve a point ... Supreme Court of Canada
The Supreme Court of Canada (SCC; french: Cour suprême du Canada, CSC) is the highest court in the judicial system of Canada. It comprises nine justices, whose decisions are the ultimate application of Canadian law, and grants permission to ... Technique
* Stanine s, a method of scaling test scores, range from 1 to 9.
*There are 9 square feet in a square yard .
Pseudoscience
* In Pythagorean numerology
Numerology (also known as arithmancy) is the belief in an occult, divine or mystical relationship between a number and one or more coinciding events. It is also the study of the numerical value, via an alphanumeric system, of the letters in ... Literature
*There are nine circles of Hell in Dante's ''Divine Comedy
The ''Divine Comedy'' ( it, Divina Commedia ) is an Italian narrative poem by Dante Alighieri, begun 1308 and completed in around 1321, shortly before the author's death. It is widely considered the pre-eminent work in Italian literature a ... Nine Bright Shiners , characters in Garth Nix's Old Kingdom trilogy . ''The Nine Bright Shiners'' was a 1930s book of poems by Anne Ridler and a 1988 fiction book by Anthea Fraser; the name derives from "a very curious old semi-pagan, semi-Christian" song.
*'' The Nine Tailors '' is a 1934 mystery novel by British writer Dorothy L. Sayers , her ninth featuring sleuth Lord Peter Wimsey .
* Nine Unknown Men are, in occult legend, the custodians of the sciences of the world since ancient times.
*In J. R. R. Tolkien 's Middle-earth
Middle-earth is the fictional setting of much of the English writer J. R. R. Tolkien's fantasy. The term is equivalent to the '' Miðgarðr'' of Norse mythology and ''Middangeard'' in Old English works, including ''Beowulf''. Middle-earth i ... ringwraiths . Additionally, The Fellowship of the Ring consists of nine companions.
*In '' Lorien Legacies '' there are nine Garde sent to Earth.
*Number Nine is a character in '' Lorien Legacies ''.
*In the series ''A Song of Ice and Fire
''A Song of Ice and Fire'' is a series of epic fantasy novels by the American novelist and screenwriter George R. R. Martin. He began the first volume of the series, '' A Game of Thrones'', in 1991, and it was published in 1996. Martin, who in ... The Wheel of Time '' series, Daughter of the Nine Moons is the title given to the heir to the throne of Seanchan, and the Court of the Nine Moons serves as the throne room of the Seanchan rulers themselves. Additionally, the nation of Illian is partially governed by a body known as the Council of Nine, and the flag of Illian displays nine golden bees on it. Furthermore, in the Age of Legends, the Nine Rods of Dominion were nine regional governors who administered individual areas of the world under the ruling world government.
Organizations
*Divine Nine – The National Pan-Hellenic Council (NPHC) is a collaborative organization of nine historically African American, international Greek-lettered fraternities and sororities.
Places and thoroughfares
* List of highways numbered 9
* Ninth Avenue is a major avenue in Manhattan.
*South Africa
South Africa, officially the Republic of South Africa (RSA), is the southernmost country in Africa. It is bounded to the south by of coastline that stretch along the South Atlantic and Indian Oceans; to the north by the neighbouring count ... Negeri Sembilan , a Malaysia
Malaysia ( ; ) is a country in Southeast Asia. The federation, federal constitutional monarchy consists of States and federal territories of Malaysia, thirteen states and three federal territories, separated by the South China Sea into two r ... state
State may refer to:
Arts, entertainment, and media Literature
* ''State Magazine'', a monthly magazine published by the U.S. Department of State
* ''The State'' (newspaper), a daily newspaper in Columbia, South Carolina, United States
* '' Our ... Peninsular Malaysia
Peninsular Malaysia ( ms, Semenanjung Malaysia; Jawi: سمننجڠ مليسيا), or the States of Malaya ( ms, Negeri-negeri Tanah Melayu; Jawi: نڬري-نڬري تانه ملايو), also known as West Malaysia or the Malaysian Peninsula, ... nagari '') of the Minangkabau migrated from West Sumatra .
Religion and philosophy
*Nine, as the highest single-digit number (in base ten ), symbolizes completeness in the Baháʼí Faith
The Baháʼí Faith is a religion founded in the 19th century that teaches the essential worth of all religions and the unity of all people. Established by Baháʼu'lláh in the 19th century, it initially developed in Iran and parts of the ... Abjad notation has a value of 9, and a 9-pointed star is used to symbolize the religion .
*The number 9 is revered in Hinduism and considered a complete, perfected and divine number because it represents the end of a cycle in the decimal system, which originated from the Indian subcontinent as early as 3000 BC
The 30th century BC was a century that lasted from the year 3000 BC to 2901 BC.
Events
* Before 3000 BC: An image of a deity (detail from a cong) recovered from Tomb 12 in Fanshan, Yuyao, Zhejiang, is made during the Neolithic period by the Li ... Gautama Buddha
Siddhartha Gautama, most commonly referred to as the Buddha, was a wandering ascetic and religious teacher who lived in South Asia during the 6th or 5th century BCE and founded Buddhism.
According to Buddhist tradition, he was born in ... Hebrew month of Av are collectively known as "The Nine Days" (''Tisha HaYamim''), and are a period of semi-mourning leading up to Tisha B'Av , the ninth day of Av on which both Temples in Jerusalem were destroyed.
*Nine is a significant number in Norse Mythology
Norse, Nordic, or Scandinavian mythology is the body of myths belonging to the North Germanic peoples, stemming from Old Norse religion and continuing after the Christianization of Scandinavia, and into the Nordic folklore of the modern peri ... Odin hung himself on an ash tree for nine days to learn the runes.
*The Fourth Way Enneagram
The Fourth Way enneagram is a figure published in 1949 in '' In Search of the Miraculous'' by P.D. Ouspensky, and an integral part of the Fourth Way esoteric system associated with George Gurdjieff. The term " enneagram" derives from two Greek ... Christian angelic hierarchy there are 9 choirs of angels.
* Ramadan , the month of fasting and prayer, is the ninth month of the Islamic calendar
The Hijri calendar ( ar, ٱلتَّقْوِيم ٱلْهِجْرِيّ, translit=al-taqwīm al-hijrī), also known in English as the Muslim calendar and Islamic calendar, is a lunar calendar consisting of 12 lunar months in a year of 354 ... Taoism
Taoism (, ) or Daoism () refers to either a school of philosophical thought (道家; ''daojia'') or to a religion (道教; ''daojiao''), both of which share ideas and concepts of Chinese origin and emphasize living in harmony with the '' Ta ... Fruit of the Holy Spirit which followers are expected to have: love
Love encompasses a range of strong and positive emotional and mental states, from the most sublime virtue or good habit, the deepest Interpersonal relationship, interpersonal affection, to the simplest pleasure. An example of this range of ... joy , peace
Peace is a concept of societal friendship and harmony in the absence of hostility and violence. In a social sense, peace is commonly used to mean a lack of conflict (such as war) and freedom from fear of violence between individuals or groups. ... patience , kindness , goodness
Goodness may refer to:
* Good
* ''Goodness!'', a 1969 album by jazz saxophonist Houston Person
* Goodness and value theory
* Goodness (band)
* Goodness (Goodness album), ''Goodness'' (Goodness album)
* Goodness (The Hotelier album), ''Goodness'' ( ... faithfulness , gentleness , and self-control
Self-control, an aspect of inhibitory control, is the ability to regulate one's emotions, thoughts, and behavior in the face of temptations and impulses. As an executive function, it is a cognitive process that is necessary for regulating one' ... Science
Astronomy
*Before 2006 (when Pluto was officially designated as a non-planet ), there were nine planet
A planet is a large, rounded astronomical body that is neither a star nor its remnant. The best available theory of planet formation is the nebular hypothesis, which posits that an interstellar cloud collapses out of a nebula to create a ... Solar System
The Solar System Capitalization of the name varies. The International Astronomical Union, the authoritative body regarding astronomical nomenclature, specifies capitalizing the names of all individual astronomical objects but uses mixed "Solar ... Messier object M9 is a magnitude 9.0 globular cluster in the constellation Ophiuchus .
*The New General Catalogue br>object NGC 9 , a spiral galaxy
Spiral galaxies form a class of galaxy originally described by Edwin Hubble in his 1936 work ''The Realm of the Nebulae''constellation Pegasus .
Chemistry
*The purity of chemicals (see Nine (purity) ).
*Nine is the atomic number
The atomic number or nuclear charge number (symbol ''Z'') of a chemical element is the charge number of an atomic nucleus. For ordinary nuclei, this is equal to the proton number (''n''p) or the number of protons found in the nucleus of every ... fluorine .
Physiology
A human pregnancy
Pregnancy is the time during which one or more offspring develops ( gestates) inside a woman's uterus (womb). A multiple pregnancy involves more than one offspring, such as with twins.
Pregnancy usually occurs by sexual intercourse, but ... Naegele's rule
The estimated date of delivery (EDD), also known as expected date of confinement, and estimated due date or simply due date, is a term describing the estimated delivery date for a pregnant woman. Normal pregnancies last between 38 and 42 weeks. Chi ... Psychology
Common terminal digit in psychological pricing
Psychological pricing (also price ending, charm pricing) is a pricing and marketing strategy based on the theory that certain prices have a psychological impact. In this pricing method, retail prices are often expressed as just-below numbers: ... Sports
Nine-ball is the standard professional pocket billiards variant played in the United States.
*In association football
Association football, more commonly known as football or soccer, is a team sport played between two teams of 11 players who primarily use their feet to propel the ball around a rectangular field called a pitch. The objective of the game is t ... baseball
Baseball is a bat-and-ball sport played between two teams of nine players each, taking turns batting and fielding. The game occurs over the course of several plays, with each play generally beginning when a player on the fielding ... right fielder 's position.
**''NINE: A Journal of Baseball History and Culture'', published by the University of Nebraska Press
The University of Nebraska Press, also known as UNP, was founded in 1941 and is an academic publisher of scholarly and general-interest books. The press is under the auspices of the University of Nebraska–Lincoln, the main campus of the Uni ... rugby league
Rugby league football, commonly known as just rugby league and sometimes football, footy, rugby or league, is a full-contact sport played by two teams of thirteen players on a rectangular field measuring 68 metres (75 yards) wide and 112 ... hooker
Hooker may refer to:
People
* Hooker (surname)
Places Antarctica
* Mount Hooker (Antarctica)
* Cape Hooker (Antarctica)
* Cape Hooker (South Shetland Islands)
New Zealand
* Hooker River
* Mount Hooker (New Zealand) in the Southern Alps
* Hoo ... Super League
The Super League (officially known as the Betfred Super League due to sponsorship from Betfred and legally known as Super League Europe), is the top-level of the British rugby league system. At present the league consists of twelve teams, of ... rugby union
Rugby union, commonly known simply as rugby, is a Contact sport#Terminology, close-contact team sport that originated at Rugby School in the first half of the 19th century. One of the Comparison of rugby league and rugby union, two codes of ru ... scrum-half .
Technology
*ISO 9
ISO 9 is an international standard establishing a system for the transliteration into Latin characters of Cyrillic characters constituting the alphabets of many Slavic and non-Slavic languages.
Published on February 23, 1995 by the Internati ... ISO 's standard for the transliteration of Cyrillic characters into Latin
Latin (, or , ) is a classical language belonging to the Italic branch of the Indo-European languages. Latin was originally a dialect spoken in the lower Tiber area (then known as Latium) around present-day Rome, but through the power ... Rich Text Format specification, 9 is the language code for the English language
English is a West Germanic language of the Indo-European language family, with its earliest forms spoken by the inhabitants of early medieval England. It is named after the Angles, one of the ancient Germanic peoples that migrated to t ... The9 Limited (owner othe9.com MMORPG World of Warcraft .
Music
*" Revolution 9 ", a sound collage which appears on The Beatles' eponymous 1968 album ''The Beatles'' (aka ''The White Album'') , prominently features a loop of a man's voice repeating the phrase "Number nine".
*There are 9 semitones in a Major 6th interval in music.
*There was a superstition
A superstition is any belief or practice considered by non-practitioners to be irrational or supernatural, attributed to fate or magic, perceived supernatural influence, or fear of that which is unknown. It is commonly applied to beliefs an ... Ludwig van Beethoven
Ludwig van Beethoven (baptised 17 December 177026 March 1827) was a German composer and pianist. Beethoven remains one of the most admired composers in the history of Western music; his works rank amongst the most performed of the classic ... Anton Bruckner , Antonin Dvorak and Gustav Mahler . See also
* 9 (disambiguation)
* 0.999...
*Cloud Nine
Cloud Nine, cloud 9 or cloud nine is a name colloquially given to the state of euphoria, and may refer to:
Books and comics
* Cloud 9 (comics), a Marvel Comics superhero that debuted in ''Avengers: The Initiative''
* ''Cloud Nine'' (novel), a 19 ... List of highways numbered 9
References
Further reading
*Cecil Balmond, "Number 9, the search for the sigma code" 1998, Prestel 2008, ,
{{DEFAULTSORT:9 (Number)
Integers
9 (number)
Superstitions about numbers
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In the beginning, various Indians wrote a digit 9 similar in shape to the modern closing 
.
The modern digit resembles an inverted ''6''. To disambiguate the two on objects and documents that can be inverted, they are often underlined. Another distinction from the 6 is that it is sometimes handwritten with two strokes and a straight stem, resembling a raised lower-case letter q.
In a 
9 is a Motzkin number, for the number of ways of drawing non-intersecting