The mathematical real transcendental (and thus irrational) constant π ≈ 3.14159..., the ratio of a circle's circumference to its diameter in Euclidean geometry, exactly half of the circle constant. The letter "π" is the first letter of the Greek words περιφέρεια 'periphery' and περίμετρος 'perimeter', i.e. the circumference.
Polyamory (in the earliest polyamory pride flag design, created by Jim Evans in 1995, pi stands for the first letter of polyamory).[2][3][4][5]
History
An early form of pi was , appearing almost like a gamma with a hook.[6][7]
Variant pi
Variant pi or "pomega" ( or ϖ) is a glyph variant of lowercase pi sometimes used in technical contexts. It resembles a lowercase omega with a macron, though historically it is simply a cursive form of pi, with its legs bent inward to meet. It was also used in the minuscule script. It is a symbol for:
Angular frequency of a wave in fluid dynamics (angular frequency is usually represented by but this may be confused with vorticity in a fluid dynamics context).
The various forms of pi are present in Unicode as:
U+03A0ΠGREEK CAPITAL LETTER PI (Π)
U+03C0πGREEK SMALL LETTER PI (π)
U+03D6ϖGREEK PI SYMBOL (ϖ, ϖ)
U+220F∏N-ARY PRODUCT (∏, ∏)
U+1D28ᴨGREEK LETTER SMALL CAPITAL PI
U+1D70B𝜋MATHEMATICAL ITALIC SMALL PI
U+1D6D1𝛑MATHEMATICAL BOLD SMALL PI.[11]
Character encodings tables
Greek / Coptic Pi[12]
Mathematical Pi
The character encodings in the tables above are intended for use as mathematical symbols. Text written in the Greek language (i.e. words, as opposed to mathematics) should not come from any of the tables on this page, but instead should use the normal Greek letters, which have different code numbers and often a different appearance. Using the mathematical symbols to display words (or vice versa) is likely to result in inconsistent spacing and a clumsy, mismatched appearance.
See also
Look up Π or π in Wiktionary, the free dictionary.
^"Pi Symbol in Greek Alphabet". greeksymbols.net. Retrieved 2023-02-07.
^Thomas, Melody (April 22, 2019). "Pretty poly: Why non-monogamous relationships are all the rage". Archived from the original on February 26, 2021. Retrieved March 24, 2021.
^Schumer, Lizz (May 16, 2022). "21 LGBTQ Flags and What They Symbolize". Good Housekeeping.
^Walsh, Matthias. "What does the polyamorous flag look like?". LGBTQ Nation.
^"Jim Evans' Polyamory Pride Flag". Archived from the original on November 10, 2014.
^Thompson, Edward Maunde (2013) [1912]. An Introduction to Greek and Latin Palaeography. Cambridge Library Collection - Classics. Cambridge: Cambridge University Press. doi:10.1017/cbo9781139833790. ISBN 978-1-108-06181-0.
^Faulmann, Karl (2000). Schriftzeichen und Alphabete aller Zeiten und Völker (in German) (Repr. nach d. Wiener Ausg. 1880, Neuausg ed.). München: Augustus. ISBN 978-3-8043-0374-4.
^"Pomega". Eric Weisstein's World of Physics. wolfram.com.
^Outline for Weeks 14&15, Astronomy 225 Spring 2008 Archived 2010-06-15 at the Wayback Machine
^Kobayashi, Hiroyuki; Takeuchi, Shingo (2019). "Applications of generalized trigonometric functions with two parameters". Communications on Pure & Applied Analysis. 18 (3): 1509. arXiv:1903.07407. doi:10.3934/cpaa.2019072. S2CID 102487670.
^"Unicode characters supported by the Calibri font". fileformat.info.
^Unicode Code Charts: Greek and Coptic (Range: 0370-03FF)