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Pi (/ˈpaɪ/; Ancient Greek /piː/ or /peî/, uppercase Π, lowercase π, cursive ϖ; Greek: πι) is the sixteenth letter of the Greek alphabet, representing the voiceless bilabial plosive IPA:. In the system of Greek numerals it has a value of 80.
English: Glyph variants of Greek letter Pi in ancient cursive handwriting, according to C. Faulmann, Schriftzeichen und Alphabete aller Zeiten und Völker, Wien 1880. Date 14 August 2010
the Pi function, i.e. the Gamma function when offset to coincide with the factorial; the complete elliptic integral of the third kind; the fundamental groupoid; osmotic pressure; represents: Archimedes' constant (more commonly just called Pi), the ratio of a circle's circumference to its diameter; the prime-counting function
The cursive forms approached the style of lowercase letter forms, with ascenders and descenders, as well as many connecting lines and ligatures between letters. In the 9th and 10th centuries, uncial book hands were replaced with a new, more compact writing style, with letter forms partly adapted from the earlier cursive. [ 57 ]
Double-struck small pi: 213C ℽ: Double-struck small gamma: 213D ℾ: Double-struck capital gamma: 213E ℿ: Double-struck capital pi 213F ⅀: Double-struck n-ary summation: 2140 ⅁ Turned sans-serif capital G 2141 ⅂ Turned sans-serif capital L 2142 ⅃ Reversed sans-serif capital L 2143 ⅄ Turned sans-serif capital Y 2144 ⅅ: Double ...
This is an accepted version of this page This is the latest accepted revision, reviewed on 2 February 2025. See also: List of Cyrillic multigraphs Main articles: Cyrillic script, Cyrillic alphabets, and Early Cyrillic alphabet This article contains special characters. Without proper rendering support, you may see question marks, boxes, or other symbols. This is a list of letters of the ...
Mathematical Alphanumeric Symbols is a Unicode block comprising styled forms of Latin and Greek letters and decimal digits that enable mathematicians to denote different notions with different letter styles.
The most common superscript digits (1, 2, and 3) were included in ISO-8859-1 and were therefore carried over into those code points in the Latin-1 range of Unicode. The remainder were placed along with basic arithmetical symbols, and later some Latin subscripts, in a dedicated block at U+2070 to U+209F.