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Omicron SARS-CoV-2 Radial Distance Tree 2021-Dec-01
Omicron (, ; uppercase Ο, lowercase ο, ) is the fifteenth letter of the Greek alphabet. This letter is derived from the Phoenician letter ayin: . In classical Greek, omicron represented the close-mid back rounded vowel in contrast to ''omega'' which represented the open-mid back rounded vowel and the digraph ''ου'' which represented the long close-mid back rounded vowel . In modern Greek, both omicron and omega represent the mid back rounded vowel or . Letters that arose from omicron include Roman O and Cyrillic O and Ю. The word literally means "little O" (''o mikron'') as opposed to "great O" (''ō mega''). In the system of Greek numerals, omicron has a value of 70. Use In addition to its use as an alphabetic letter, omicron is occasionally used in technical notation, but its use is limited since both upper case and lower case (Ο ο) are indistinguishable from the Latin letter "o" (O o) and difficult to distinguish from the Arabic numeral "zero" ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
O (Cyrillic)
O (О о; italics: ''О о'') is a letter of the Cyrillic script. The letter most commonly represents the sound /ɔ/, like the o in "off". In Russian language, Russian and Serbo-Croatian, it represents the sound /o/. History The Cyrillic letter О was derived from the Greek alphabet, Greek letter Omicron (Ο ο). Form Modern fonts In modern-style typefaces, the Cyrillic letter O Homoglyph, looks exactly like the O, Latin letter O and the Omicron, Greek letter Omicron . Church Slavonic printed fonts and Slavonic manuscripts Historical typefaces (like ''poluustav'' (semi-uncial), a standard font style for the Church Slavonic language, Church Slavonic typography) and old manuscripts represent several additional glyph variants of Cyrillic O, both for decorative and orthographic (sometimes also "hieroglyphic") purposes, namely: * broad variant (Ѻ/ѻ), used mostly as a word initial letter (see Broad On for more details); * narrow variant, ᲂ, being used now in Synodal Ch ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Big O Notation
Big ''O'' notation is a mathematical notation that describes the asymptotic analysis, limiting behavior of a function (mathematics), function when the Argument of a function, argument tends towards a particular value or infinity. Big O is a member of a #Related asymptotic notations, family of notations invented by German mathematicians Paul Gustav Heinrich Bachmann, Paul Bachmann, Edmund Landau, and others, collectively called Bachmann–Landau notation or asymptotic notation. The letter O was chosen by Bachmann to stand for '':wikt:Ordnung#German, Ordnung'', meaning the order of approximation. In computer science, big O notation is used to Computational complexity theory, classify algorithms according to how their run time or space requirements grow as the input size grows. In analytic number theory, big O notation is often used to express a bound on the difference between an arithmetic function, arithmetical function and a better understood approximation; one well-known exam ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sampi
Sampi (modern: ϡ; ancient shapes: , ) is an Archaic Greek alphabets, archaic letter of the Greek alphabet. It was used as an addition to the classical 24-letter alphabet in some eastern Ionic Greek, Ionic dialects of ancient Greek in the 6th and 5th centuries BC, to denote some type of a sibilant sound, probably or , and was abandoned when the sound disappeared from Greek. It later remained in use as a numeral symbol for 900 in the alphabetic ("Milet, Milesian") system of Greek numerals. Its modern shape, which resembles a π inclining to the right with a longish curved cross-stroke, developed during its use as a numeric symbol in minuscule Greek, minuscule handwriting of the Byzantine empire, Byzantine era. Its current name, ''sampi'', originally probably meant "''san pi''", i.e. "like a pi (letter), pi", and is also of medieval origin. The letter's original name in antiquity is not known. It has been proposed that sampi was a continuation of the archaic letter ''san (letter ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pi (letter)
Pi (; Ancient Greek or , uppercase Π, lowercase π, cursive ϖ; ) is the sixteenth letter of the Greek alphabet, representing the voiceless bilabial plosive . In the system of Greek numerals it has a value of 80. It was derived from the Phoenician alphabet, Phoenician letter Pe (Semitic letter), Pe (). Letters that arose from pi include Latin alphabet, Latin P, Cyrillic script, Cyrillic Pe (Cyrillic), Pe (П, п), Coptic alphabet, Coptic pi (Ⲡ, ⲡ), and Gothic alphabet, Gothic pairthra (𐍀). Uppercase Pi The uppercase letter Π is used as a symbol for: * In textual criticism, ''Codex Petropolitanus (New Testament), Codex Petropolitanus'', a 9th-century uncial codex of the Gospels, now located in St. Petersburg, Russia. * In legal shorthand, it represents a plaintiff. * In Mathematical finance, it represents a portfolio. Greek letters used in mathematics, science, and engineering, In science and engineering: * The product (mathematics), product operator in mathematics, i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Koppa (letter)
Koppa or qoppa (; as a modern numeral sign: ) is a letter that was used in early forms of the Greek alphabet, derived from Phoenician qoph (). It was originally used to denote the sound, but dropped out of use as an alphabetic character and replaced by Kappa (Κ). It has remained in use as a numeral symbol (90) in the system of Greek numerals, although with a modified shape. Koppa is the source of Latin Q, as well as the Cyrillic numeral sign of the same name ( Koppa). Alphabetic In Phoenician, qoph was pronounced ; in Greek, which lacked such a sound, it was instead used for before back vowels Ο, Υ and Ω. In this function, it was borrowed into the Italic alphabets and ultimately into Latin. However, as the sound had two redundant spellings, koppa was eventually replaced by kappa (Κ) in Greek. It remained in use as a letter in some Doric regions into the 5th century BC. The koppa was used as a symbol for the city of Corinth, which was originally spelled in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Digamma
Digamma or wau (uppercase: Ϝ, lowercase: ϝ, numeral: ϛ) is an Archaic Greek alphabets, archaic letter of the Greek alphabet. It originally stood for the sound but it has remained in use principally as a Greek numeral for 6 (number), 6. Whereas it was originally called ''waw'' or ''wau'', its most common appellation in classical Greek is ''digamma''; as a numeral, it was called ''episēmon'' during the Byzantine era and is now known as ''stigma (letter), stigma'' after the Greek ligature, Byzantine ligature combining σ-τ as ϛ. Digamma or wau was part of the original archaic Greek alphabet as initially adopted from Phoenician alphabet, Phoenician. Like its model, Phoenician Waw (letter), waw, it represented the voiced labial-velar approximant and stood in the 6th position in the alphabet between epsilon and zeta. It is the consonantal doublet of the vowel letter upsilon (), which was also derived from waw but was placed near the end of the Greek alphabet. Digamma or wau ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zeta
Zeta (, ; uppercase Ζ, lowercase ζ; , , classical or ''zē̂ta''; ''zíta'') is the sixth letter of the Greek alphabet. In the system of Greek numerals, it has a value of 7. It was derived from the Phoenician alphabet, Phoenician letter zayin . Letters that arose from zeta include the Roman Z and Cyrillic Ze (Cyrillic), З. Name Unlike the other Greek alphabet, Greek letters, this letter did not take its name from the Phoenician alphabet, Phoenician letter from which it was derived; it was given a new name on the pattern of Beta (letter), beta, eta and theta. The word ''zeta'' is the ancestor of ''zed'', the name of the Latin letter Z in Commonwealth English. Swedish language, Swedish and many Romance languages (such as Italian language, Italian and Spanish language, Spanish) do not distinguish between the Greek and Roman forms of the letter; "''zeta''" is used to refer to the Roman letter Z as well as the Greek letter. Uses Letter The letter ζ represents the voiced ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Epsilon
Epsilon (, ; uppercase , lowercase or ; ) is the fifth letter of the Greek alphabet, corresponding phonetically to a mid front unrounded vowel or . In the system of Greek numerals it also has the value five. It was derived from the Phoenician alphabet, Phoenician letter He (letter), He . Letters that arose from epsilon include the Roman E, Ë and Latin epsilon, Ɛ, and Cyrillic Ye (Cyrillic), Е, Ye with grave, È, Yo (Cyrillic), Ё, Ukrainian Ye, Є and E (Cyrillic), Э. The name of the letter was originally (), but it was later changed to ( 'simple e') in the Middle Ages to distinguish the letter from the digraph (orthography), digraph , a former diphthong that had come to be pronounced the same as epsilon. The uppercase form of epsilon is identical to Latin but has its own code point in Unicode: . The lowercase version has two typographical variants, both inherited from history of the Greek alphabet, medieval Greek handwriting. One, the most common in modern typograph ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geometry
Geometry (; ) is a branch of mathematics concerned with properties of space such as the distance, shape, size, and relative position of figures. Geometry is, along with arithmetic, one of the oldest branches of mathematics. A mathematician who works in the field of geometry is called a ''List of geometers, geometer''. Until the 19th century, geometry was almost exclusively devoted to Euclidean geometry, which includes the notions of point (geometry), point, line (geometry), line, plane (geometry), plane, distance, angle, surface (mathematics), surface, and curve, as fundamental concepts. Originally developed to model the physical world, geometry has applications in almost all sciences, and also in art, architecture, and other activities that are related to graphics. Geometry also has applications in areas of mathematics that are apparently unrelated. For example, methods of algebraic geometry are fundamental in Wiles's proof of Fermat's Last Theorem, Wiles's proof of Fermat's ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Euclid's Elements
The ''Elements'' ( ) is a mathematics, mathematical treatise written 300 BC by the Ancient Greek mathematics, Ancient Greek mathematician Euclid. ''Elements'' is the oldest extant large-scale deductive treatment of mathematics. Drawing on the works of earlier mathematicians such as Hippocrates of Chios, Eudoxus of Cnidus and Theaetetus (mathematician), Theaetetus, the ''Elements'' is a collection in 13 books of definitions, postulates, propositions and mathematical proofs that covers plane and solid Euclidean geometry, elementary number theory, and Commensurability (mathematics), incommensurable lines. These include Pythagorean theorem, Thales' theorem, the Euclidean algorithm for greatest common divisors, Euclid's theorem that there are infinitely many prime numbers, and the Compass-and-straightedge construction, construction of regular polygons and Regular polyhedra, polyhedra. Often referred to as the most successful textbook ever written, the ''Elements'' has continued to be ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Euclid
Euclid (; ; BC) was an ancient Greek mathematician active as a geometer and logician. Considered the "father of geometry", he is chiefly known for the '' Elements'' treatise, which established the foundations of geometry that largely dominated the field until the early 19th century. His system, now referred to as Euclidean geometry, involved innovations in combination with a synthesis of theories from earlier Greek mathematicians, including Eudoxus of Cnidus, Hippocrates of Chios, Thales and Theaetetus. With Archimedes and Apollonius of Perga, Euclid is generally considered among the greatest mathematicians of antiquity, and one of the most influential in the history of mathematics. Very little is known of Euclid's life, and most information comes from the scholars Proclus and Pappus of Alexandria many centuries later. Medieval Islamic mathematicians invented a fanciful biography, and medieval Byzantine and early Renaissance scholars mistook him for the earlier philo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Omega
Omega (, ; uppercase Ω, lowercase ω; Ancient Greek ὦ, later ὦ μέγα, Modern Greek ωμέγα) is the twenty-fourth and last letter in the Greek alphabet. In the Greek numerals, Greek numeric system/isopsephy (gematria), it has a value of 800. The word literally means "great O" (''o mega'', mega meaning "great"), as opposed to omicron, which means "little O" (''o mikron'', mikron meaning "little"). In Phonetics, phonetic terms, the Ancient Greek Ω represented a vowel length, long open-mid back rounded vowel , comparable to the "aw" of the English language, English word ''raw'' in dialects without the cot–caught merger, in contrast to omicron, which represented the close-mid back rounded vowel , and the digraph (orthography), digraph ''ου'', which represented the vowel length, long close-mid back rounded vowel . In Modern Greek, both omega and omicron represent the mid back rounded vowel or . The letter omega is transliteration, transliterated into a Lati ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
