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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.
Equilibrium arrows Template Result Unicode <math> <chem> meaning {} ⇌ U+21CC ⇌ RIGHTWARDS HARPOON OVER LEFTWARDS HARPOON \rightleftharpoons <=> Is in equilibrium with, either equal (neither side favored) or without regard to favored side {} <<=> Is in a disfavored equilibrium with {}
Equilibrium arrows Template Result Unicode <math> <chem> meaning {} ⇌ U+21CC ⇌ RIGHTWARDS HARPOON OVER LEFTWARDS HARPOON \rightleftharpoons <=> Is in equilibrium with, either equal (neither side favored) or without regard to favored side {} <<=> Is in a disfavored equilibrium with {}
Version Final code points [a] Count L2 ID WG2 ID Document 3.2: U+2980..2996, 2999..29D7, 29DC..29E5, 29E7..29FB: 117: L2/98-405: Beeton, Barbara; Ion, Patrick (1998-12-01), Proposal to encode additional mathematical and technical symbols in ISO/IEC 10646
For most symbols, the entry name is the corresponding Unicode symbol. So, for searching the entry of a symbol, it suffices to type or copy the Unicode symbol into the search textbox. Similarly, when possible, the entry name of a symbol is also an anchor, which allows linking easily from another Wikipedia article. When an entry name contains ...
U+2113 ℓ SCRIPT SMALL L; "despite its character name, this symbol is derived from a special italicized version of the small letter l". [6] It has various other specialized uses, such as a liter symbol and as the azimuthal quantum number symbol. U+2118 ℘ SCRIPT CAPITAL P is a symbol for Weierstrass's elliptic function. [7]
Usage of this symbol dates back to the early computer interfaces developed at Xerox PARC in the 1980s. [18] It is also similar to the icon frequently used to indicate justified text alignment . It is an oft-used component of Google's Material Design guidelines and many Android apps and web apps that follow these guidelines make use of the ...
unstrict inequality signs (less-than or equals to sign and greater-than or equals to sign) 1670 (with the horizontal bar over the inequality sign, rather than below it) John Wallis: 1734 (with double horizontal bar below the inequality sign) Pierre Bouguer