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
Related Words for equivalencecorrespondence, par, likeness, parity, synonym, agreement, compatibility, evenness, correlation, equality, match, conformity, parallel, identity, interchangeability, synonymy
Examples from the Web for equivalence
Contemporary Examples of equivalence
He was trying, I think, to demonstrate balance and equivalence.Memo to Cops: Criticisms Aren’t Attacks
December 28, 2014
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
July 20, 2014
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
Historical Examples of equivalence
Then the expression of equivalence of A and B remains unchanged.
He satisfies himself as to the equivalence of the servicesthat is all.Harmonies of Political Economy
If we had the means of measurement we could prove the equivalence from step to step.Life Everlasting
There is no law of equivalence, of conservation of energy, in social forces.Social Value
B. M. Anderson
By 1709 these species had sunk in equivalence to 12 livres 15 sols.The History of Currency, 1252 to 1896
William Arthur Shaw
- the relationship between two statements, each of which implies the other
- Also called: biconditionalthe 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
1540s, from French équivalence, from Medieval Latin aequivalentia, from aequivalentem (see equivalent). Related: Equivalency (1530s).