(sciences, strictly) A mathematical science, i.e. a field of science such as mathematics or mathematical physics which is capable of perfectly exact results based on rigorously formal methods.

(informal) Exactly the same; identical.

(informal) Same, exactly the same, exact same.

plural of exact sequence

A perfect rhyme.

(topology) Given a collection S of subsets of a set X: a subcollection S^* of S such that each element in X is contained in exactly one subset in S^*.

An amount of change whose combined monetary value exactly matches the value that a seller requires in exchange for goods or services.

plural of exact cover

plural of exact rhyme

(algebra) An exact sequence of precisely three nontrivial objects (e.g., modules).