^ Goldstein, Catherine Schappacher, Norbert Schwermer, Joachim (2007), The Shaping of Arithmetic after C.F.^ Cajori, Florian (2013), A History of Mathematical Notations, Dover Books on Mathematics, Courier Dover Publications, p. 418, ISBN 978-6-7.(1986), Introduction to higher order categorical logic, Cambridge University Press, p. ix, Remark on notation: throughout this book, we frequently, though not exclusively, use the symbol ≡ for definitional equality. ^ Gallian, Joseph (2009), Contemporary Abstract Algebra (7th ed.), Cengage Learning, p. 16, ISBN 978-9-7.^ Dube, Rakesh Pandey, Adesh Gupta, Ritu (2006), Discrete Structures and Automata Theory, Alpha Science Int'l Ltd., p. 277, ISBN 978-1-84265-256-5.^ Hurley, Patrick (2014), A Concise Introduction to Logic (12th ed.), Cengage Learning, p. 338, ISBN 978-6-7.^ Lamport, Leslie (1994), LaTeX: A Document Preparation System (2nd ed.), Addison-Wesley, p. 43.For example, HC≡CH is a common shorthand for acetylene (systematic name: ethyne). In chemistry, the triple bar can be used to represent a triple bond between atoms. In botanical nomenclature, the triple bar denotes homotypic synonyms (those based on the same type specimen), to distinguish them from heterotypic synonyms (those based on different type specimens), which are marked with an equals sign. The colon notation has the advantage that it reflects the inherent asymmetry in the definition of one object from already defined objects.
#Not equal to sign powerpoint code#
In LaTeX mathematical formulas, the code \equiv produces the triple bar symbol and \not\equiv produces the negated triple bar symbol ≢. The closely related code point U+2262 ≢ NOT IDENTICAL TO ( ≢, &NotCongruent ) is the same symbol with a slash through it, indicating the negation of its mathematical meaning.
The triple bar character in Unicode is code point U+2261 ≡ IDENTICAL TO ( &Congruent, ≡). It has the appearance of an equals sign ⟨=⟩ sign with a third line. Its main uses are in mathematics and logic. The triple bar or tribar, ≡, is a symbol with multiple, context-dependent meanings indicating equivalence of two different things. Without proper rendering support, you may see question marks, boxes, or other symbols. This article contains special characters.
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