(set theory) A binary relation that is reflexive, symmetric and transitive.

(physics) any of several principles, in relativity, concerned with the uniformity of physical measurements in different frames of reference

(linear algebra) A relation between two matrices of the same size, such that every row of one matrix is a linear combination of the rows of the other matrix, and vice versa. It is an equivalence relation.

plural of equivalence relation

plural of equivalence class

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

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

(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.

(mathematics) A certain relationship defined between algebraic rings that preserves many ring-theoretic properties.

plural of elementary equivalence