Equals sign

  • 2 + 2 = 5 - The phrase "two plus two equals five" is a slogan used in many different forms of media, most notably in Part One, Chapter Seven of the book 1984 by George Orwell.
  • Double hyphen - The double hyphen is a punctuation mark that consists of two parallel hyphens. It was a development of the earlier double oblique hyphen which developed from a Central European variant of the virgule slash, originally a form of scratch comma.
  • Equality (mathematics) - In mathematics, equality is a relationship between two quantities or, more generally two mathematical expressions, asserting that the quantities have the same value, or that the expressions represent the same mathematical object.
  • Logical equality - Logical equality is a logical operator that corresponds to equality in Boolean algebra and to the logical biconditional in propositional calculus. It gives the functional value true if both functional arguments have the same logical value, and false if they are different.
  • Plus and minus signs - The plus and minus signs are mathematical symbols used to represent the notions of positive and negative as well as the operations of addition and subtraction. Their use has been extended to many other meanings, more or less analogous.
  • Mathematical symbols
  • Welsh inventions

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