plural of topological group

plural of symmetric group

(algebra) A group in which the group operation is commutative.

A blood type.

(topology) For a specified topological space, the group whose elements are homotopy classes of loops (images of some arbitrary closed interval whose endpoints are both mapped to a designated point) and whose group operation is concatenation.

plural of age group

An interdisciplinary collaboration of researchers working on new research activities that would be difficult to develop under traditional funding mechanisms, such as federal agencies.

(group theory) A group that has a presentation without relators; equivalently, a free product of some number of copies of ℤ.

(mathematics) Any discrete group of isometries of the hyperbolic plane.

(organic chemistry) Any chemical entity that is temporarily reacted with a functional group so as to protect it from a subsequent reaction