cochain complex

cochain complex

[′kō‚chān ′käm‚pleks]
(mathematics)
A sequence of Abelian groups Cn,- ∞ <>n < ∞,="" together="" with="" coboundary="" homomorphisms=""> n : CnC n +1such that δ n +1- δ n = 0.
References in periodicals archive ?
A cochain complex is a Z-graded differential module E = [[direct sum].
is a cochain complex and d is an antiderivation, i.
op] for a cochain complex C denotes the opposite chain complex that one obtains by reindexing in the opposite order and reversing all the arrows.