(logic) A relation between two structures which have the property that every first-order formula is valid in one structure if and only if it is valid in the other.

(electronics) a logic gate performing a Boolean logic equivalence operation; an XNOR gate.

plural of equivalence relation

plural of equivalence class

(genetics) The concept that all cells in an organism contain identical genes.

(economics) The idea that consumers are forward-looking and so internalize the government's budget constraint when making their consumption decisions, so that, for a given pattern of government spending, the method of financing such spending does not affect agents' consumption decisions, and thus does not change aggregate demand.

(category theory) An adjunction whose unit and counit are both natural isomorphisms.

A logical fallacy in which an equivalence is drawn between two subjects based on flawed or false reasoning.

A relationship that considers two elements equivalent if one can be obtained from the other by a sequence of transformations of the form yzx -> yxz whenever x zxy whenever x ≤ y < z.

plural of equivalence principle