cohomology

== English == === Etymology === From co- + homology. === Pronunciation === Rhymes: -ɒlədʒi === Noun === cohomology (countable and uncountable, plural cohomologies) (mathematics) 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. (mathematics) A system of quotient groups associated to a topological space. ==== Derived terms ==== ==== Translations ====