cohomology

Oznaczający

1. A method of contravariantly associating a family of invariant quotient groups to each algebraic or geometric object of a category, including categories of geometric and algebraic objects.
2. A system of quotient groups associated to a topological space.

Etymologia

From co- + homology.

Zdania

Cohomology arises from the algebraic dualization of the construction of homology .