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propositional logic, Boolean algebra, first-order logic. ⊥ {\displaystyle \bot } denotes a proposition that is always false. The symbol ⊥ may also refer to perpendicular lines. The proposition. ⊥ ∧ P {\displaystyle \bot \wedge P} is always false since at least one of the two is unconditionally false. ∀.
Without proper rendering support, you may see question marks, boxes, or other symbols. The triple bar or tribar, ≡, is a symbol with multiple, context-dependent meanings indicating equivalence of two different things. Its main uses are in mathematics and logic. It has the appearance of an equals sign = with a third line.
A well-known equality featuring the equal sign. The equals sign (British English) or equal sign (American English), also known as the equality sign, is the mathematical symbol =, which is used to indicate equality in some well-defined sense. [1] In an equation, it is placed between two expressions that have the same value, or for which one ...
Glossary 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 ...
On a computer running the Microsoft Windows operating system, many special characters that have decimal equivalent codepoint numbers below 256 can be typed in by using the keyboard's Alt + decimal equivalent code numbers keys. For example, the character é (Small e with acute accent, HTML entity code é) can be obtained by pressing Alt + 130.
Mathematical operators and symbols are in multiple Unicode blocks. Some of these blocks are dedicated to, or primarily contain, mathematical characters while others are a mix of mathematical and non-mathematical characters. This article covers all Unicode characters with a derived property of "Math". [ 2 ][ 3 ]
See also. ≅, a symbol used in approximation. The eight trigrams of the Bagua: ☰, ☱, ☲, ☳, ☴, ☵, ☶, ☷. Ξ, capital letter Xi of the Greek alphabet. 三, Chinese numeral for the number 3. Glossary of mathematical symbols. Tesla Model 3, whose logo originally stylized the digit 3 as three horizontal bars. III (disambiguation ...
Eth (/ ɛð / edh, uppercase: Ð, lowercase: ð; also spelled edh or eð), known as ðæt in Old English, [ 1 ] is a letter used in Old English, Middle English, Icelandic, Faroese (in which it is called edd), and Elfdalian. It was also used in Scandinavia during the Middle Ages, but was subsequently replaced with dh , and later d .