Noun
exact sequence (plural exact sequences)
(algebra) A sequence of groups with adjacent groups connected by homomorphisms such that the image of one homomorphism is the kernel of the next.
Suppose you had to remember to beat your heart, contract in exact sequence the muscles you use for every step. ... Conservatism comes out of the body, the sense of many things being done for us that any attempt to re-think, or even make conscious, would fatally disrupt. James Richardson