单词 | identity sign |
释义 | > as lemmasidentity sign identity sign n. Mathematics a sign denoting identity (sense 4a); spec. the sign ≡.The sign ≡ was introduced by Riemann ( B. Riemann Elliptische Functionen (1899) 1). ΚΠ 1902 Bull. Amer. Math. Soc. 9 164 The type is good, excepting the identity sign. 1950 W. V. Quine Methods of Logic (1952) 211 It is the use of the identity sign between variables, rather than between singular terms, that is fundamental. 2000 G. E. R. Haddock in C. O. Hill & G. E. R. Haddock Husserl or Frege? iii. 43 Identity statements..express a relation of identity between the two objects that are the referents of the expressions at each side of the identity sign. < as lemmas |
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