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Turned A
Turned A (capital: Ɐ, lowercase: ɐ, math symbol ∀) is a letter and symbol based upon the letter A. Modern Usage * Lowercase ɐ (in Roman or two story form) is used in the International Phonetic Alphabet to identify the near-open central vowel. This is not to be confused with the ''turned alpha'' or ''turned script a'', ɒ, which is used in the IPA for the open back rounded vowel. * The logical symbol ∀, has the same shape as a sans-serif capital turned A. It is used to represent universal quantification in predicate logic, where it is typically read as "for all". It was first used in this way by Gerhard Gentzen in 1935, by analogy with Giuseppe Peano's turned E notation for existential quantification and the later use of Peano's notation by Bertrand Russell. * In traffic engineering it is used to represent flow, the number of units (vehicles) passing a point in a unit of time. * It may also be used in unit rates. Historical Usage File:Turned A in Edward Lhu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Symbol (formal)
A logical symbol is a fundamental concept in logic, tokens of which may be marks or a configuration of marks which form a particular pattern. Although the term "symbol" in common use refers at some times to the idea being symbolized, and at other times to the marks on a piece of paper or chalkboard which are being used to express that idea; in the formal languages studied in mathematics and logic, the term "symbol" refers to the idea, and the marks are considered to be a token instance of the symbol. In logic, symbols build literal utility to illustrate ideas. Overview Symbols of a formal language need not be symbols ''of'' anything. For instance there are logical constants which do not refer to any idea, but rather serve as a form of punctuation in the language (e.g. parentheses). Symbols of a formal language must be capable of being specified without any reference to any interpretation of them. A symbol or string of symbols may comprise a well-formed formula if it is consiste ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Michael Everson
Michael Everson (born January 9, 1963) is an American and Irish linguist, script encoder, typesetter, type designer and publisher. He runs a publishing company called Evertype, through which he has published over a hundred books since 2006. His central area of expertise is with writing systems of the world, specifically in the representation of these systems in formats for computer and digital media. In 2003 Rick McGowan said he was "probably the world's leading expert in the computer encoding of scripts" for his work to add a wide variety of scripts and characters to the Universal Character Set. Since 1993, he has written over two hundred proposals which have added thousands of characters to ISO/IEC 10646 and the Unicode standard; as of 2003, he was credited as the leading contributor of Unicode proposals. Life Everson was born in Norristown, Pennsylvania, and moved to Tucson, Arizona, at the age of 12. His interest in the works of J. R. R. Tolkien led him to study Old E ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rotated Letter
In the days of printing with metal type sorts, it was common to rotate letters and digits 180° to create new symbols. This was done for example with the Palaeotype alphabet, the International Phonetic Alphabet, the Fraser script, and for some mathematical symbols. Perhaps the earliest instance of this that is still in use was turned e for schwa. Note the leading J of Jacquard in Caslon italic typeface, which was turned for the pound sign £. In the eighteenth-century Caslon metal fonts, the British pound sign (£) was set with a rotated italic uppercase J. Unicode support The following rotated (turned) letters have Unicode codepoints unless otherwise indicated. Latin In this table, parentheses mark letters that stand in for themselves or for another. For instance, a rotated 'b' would be a 'q', and indeed some physical typefaces didn't bother with distinct sorts for those letters, while a rotated 's' would be itself. Long s with a combining dot below, , can stand in for a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Transformation Of Text
Transformations of text are strategies to perform geometric transformations on text (reversal, rotations, etc.), particularly in systems that do not natively support transformation, such as HTML, seven-segment displays and plain text. Implementation Many systems, such as HTML, seven-segment displays and plain text, do not support transformation of text. In the case of HTML, this limitation in display may eventually be addressed through standard cascading style sheets (CSS), since proposed specifications for CSS3 include rotation for block elements. In the meantime, several ways of producing the visual effects of text transformations have come into use. The most common of these transformations are rotation and reflection. Unicode supports a variety of characters that resemble transformed characters, primarily for various forms of phonetic transcription. Each of these character names indicates what kind of transformation the characters have undergone: *Reversed characters, tho ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Mathematical Symbols
A mathematical symbol is a figure or a combination of figures that is used to represent a mathematical object, an action on mathematical objects, a relation between mathematical objects, or for structuring the other symbols that occur in a formula. As formulas are entirely constituted with symbols of various types, many symbols are needed for expressing all mathematics. The most basic symbols are the decimal digits (0, 1, 2, 3, 4, 5, 6, 7, 8, 9), and the letters of the Latin alphabet. The decimal digits are used for representing numbers through the Hindu–Arabic numeral system. Historically, upper-case letters were used for representing points in geometry, and lower-case letters were used for variables and constants. Letters are used for representing many other sorts of mathematical objects. As the number of these sorts has remarkably increased in modern mathematics, the Greek alphabet and some Hebrew letters are also used. In mathematical formulas, the standard typeface is italic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Logic Symbols
In logic, a set of symbols is commonly used to express logical representation. The following table lists many common symbols, together with their name, how they should be read out loud, and the related field of mathematics. Additionally, the subsequent columns contains an informal explanation, a short example, the Unicode location, the name for use in HTML documents, and the LaTeX symbol. Basic logic symbols Advanced and rarely used logical symbols These symbols are sorted by their Unicode value: Usage in various countries Poland and Germany in Poland, the universal quantifier is sometimes written ∧, and the existential quantifier as ∨. The same applies for Germany. Japan The ⇒ symbol is often used in text to mean "result" or "conclusion", as in "We examined whether to sell the product ⇒ We will not sell it". Also, the → symbol is often used to denote "changed to", as in the sentence "The interest rate changed. March 20% → April 21%". See also * Józef M ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Symbol (typeface)
Symbol is one of the four standard fonts available on all PostScript-based printers, starting with Apple's original LaserWriter (1985). It contains a complete unaccented Greek alphabet (upper and lower case) and a selection of commonly used mathematical symbols. Insofar as it fits into any standard classification, it is a serif font designed in the style of Times New Roman. Due to its non-standard character set, lack of diacritical characters, and type design inappropriate for continuous text, Symbol cannot easily be used for setting Greek language text, though it has been used for that purpose in the absence of proper Greek fonts. Its primary purpose is to typeset mathematical expressions. There was also an earlier ''Symbol'' designed in 1933 by Carl Albert Fahrenwaldt for Schriftguss Type Foundry. It was a font of decorative initials based on his roman font '' Minister''. Encoding The font was created by Adobe and has its own character encoding, with the Greek letters arrang ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Uralic Phonetic Alphabet
The Uralic Phonetic Alphabet (UPA) or Finno-Ugric transcription system is a phonetic transcription or notational system used predominantly for the transcription and reconstruction of Uralic languages. It was first published in 1901 by Eemil Nestor Setälä, a Finnish linguist. UPA differs from the International Phonetic Alphabet (IPA) notation in several ways. The basic UPA characters are based on the Finnish alphabet where possible, with extensions taken from Cyrillic and Greek orthographies. Small-capital letters and some novel diacritics are also used. General Unlike the IPA, which is usually transcribed with upright characters, the UPA is usually transcribed with italic characters. Although many of its characters are also used in standard Latin, Greek, Cyrillic orthographies or the IPA, and are found in the corresponding Unicode blocks, many are not. These have been encoded in the ''Phonetic Extensions'' and ''Phonetic Extensions Supplement'' blocks. Font support for ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Logogram
In a written language, a logogram, logograph, or lexigraph is a written character that represents a word or morpheme. Chinese characters (pronounced '' hanzi'' in Mandarin, ''kanji'' in Japanese, ''hanja'' in Korean) are generally logograms, as are many hieroglyphic and cuneiform characters. The use of logograms in writing is called ''logography'', and a writing system that is based on logograms is called a ''logography'' or ''logographic system''. All known logographies have some phonetic component, generally based on the rebus principle. Alphabets and syllabaries are distinct from logographies in that they use individual written characters to represent sounds directly. Such characters are called '' phonograms'' in linguistics. Unlike logograms, phonograms do not have any inherent meaning. Writing language in this way is called ''phonemic writing'' or ''orthographic writing''. Etymology Doulgas Harper's Online Etymology Dictionary states that the term 'logogram' was deriv ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aleph
Aleph (or alef or alif, transliterated ʾ) is the first letter of the Semitic abjads, including Phoenician , Hebrew , Aramaic , Syriac , Arabic ʾ and North Arabian 𐪑. It also appears as South Arabian 𐩱 and Ge'ez . These letters are believed to have derived from an Egyptian hieroglyph depicting an ox's head to describe the initial sound of ''*ʾalp'', the West Semitic word for ox (compare Biblical Hebrew ''ʾelef'', "ox"). The Phoenician variant gave rise to the Greek alpha (), being re-interpreted to express not the glottal consonant but the accompanying vowel, and hence the Latin A and Cyrillic А. Phonetically, ''aleph'' originally represented the onset of a vowel at the glottis. In Semitic languages, this functions as a prosthetic weak consonant, allowing roots with only two true consonants to be conjugated in the manner of a standard three consonant Semitic root. In most Hebrew dialects as well as Syriac, the ''aleph'' is an absence of a true co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Proto-Sinaitic Script
Proto-Sinaitic (also referred to as Sinaitic, Proto-Canaanite when found in Canaan, the North Semitic alphabet, or Early Alphabetic) is considered the earliest trace of alphabetic writing and the common ancestor of both the Ancient South Arabian script and the Phoenician alphabet, which led to many modern alphabets including the Greek alphabet. According to common theory, Canaanites or Hyksos who spoke a Semitic language repurposed Egyptian hieroglyphs to construct a different script. The script is attested in a small corpus of inscriptions found at Serabit el-Khadim in the Sinai Peninsula, Egypt, dating to the Middle Bronze Age (2100–1500 BC). The earliest Proto-Sinaitic inscriptions are mostly dated to between the mid-19th (early date) and the mid-16th (late date) century BC. However, the discovery of the Wadi el-Hol inscriptions near the Nile River indicates that the script originated in Egypt. The evolution of Proto-Sinaitic and the various Proto-Canaanite scripts during ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acrophony
Acrophony (; Greek: ἄκρος ''akros'' uppermost + φωνή ''phone'' sound) is the naming of letters of an alphabetic writing system so that a letter's name begins with the letter itself. For example, Greek letter names are acrophonic: the names of the letters α, β, γ, δ, are spelled with the respective letters: (''alpha''), (''beta''), (''gamma''), (''delta''). The paradigm for acrophonic alphabets is the Proto-Sinaitic script and the succeeding Phoenician alphabet, in which the letter A, representing the sound , is thought to have derived from an Egyptian hieroglyph representing an ox, and is called "ox", ''ʾalp'', which starts with the glottal stop sound the letter represents. The Latin alphabet is descended from the Phoenician, and the stylized head of an ox can still be seen if the letter A is turned upside-down: ∀. The second letter of the Phoenician alphabet is ''bet'' (which means "house" and looks a bit like a shelter) representing the sound and fro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
