Equivalence is the property of two or more expressions being equivalent to one other.
Equivalence
See also
Biconditional, Equal, Equality, Equivalence Relation, EquivalentExplore with Wolfram|Alpha
Cite this as:
Weisstein, Eric W. "Equivalence." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/Equivalence.html