noun Also equivalency (for defs 1, 2).
- Also called material implication. the relation between two propositions such that the second is not false when the first is true.
- Also called material equivalence. the relation between two propositions such that they are either both true or both false.
- the relation between two propositions such that each logically implies the other.
Origin of equivalence
Examples from the Web for equivalence
He was trying, I think, to demonstrate balance and equivalence.
The equivalence between comic books and Scripture is telling of how seriously canon is taken by these fans.DC Comics’ Diversity Crisis: Why the Status Quo Rules|Liz Watson|July 20, 2014|DAILY BEAST
The experiment found that the type of atom made no difference to the outcome, perfectly in line with the equivalence principle.The Equivalence Principle and Testing Einstein With Spaceships and Atoms|Matthew R. Francis|June 4, 2014|DAILY BEAST
At one time a vague relation is supposed which is only true on a large scale, and is a union rather than an equivalence.The Mind and the Brain|Alfred Binet
From this equivalence the reader can easily compute the value which the intermediate measures would have according to this theory.Archology and the Bible|George A. Barton
He satisfies himself as to the equivalence of the servicesthat is all.
The equivalence of services, then, is a different thing from a just appreciation of their utility.
From all this arises the notion of the equivalence of two forces.
British Dictionary definitions for equivalence
- the relationship between two statements, each of which implies the other
- Also called: biconditional the binary truth-function that takes the value true when both component sentences are true or when both are false, corresponding to English if and only if . Symbol: ≡ or ↔, as in –(p ∧ q) ≡ – p ∨ – q
Word Origin and History for equivalence
1540s, from French équivalence, from Medieval Latin aequivalentia, from aequivalentem (see equivalent). Related: Equivalency (1530s).