plural of group theoretician

plural of group marriage

A form of psychotherapy where patients are treated as a group, using group dynamics.

A Christian religious group that meets to study the Bible, usually in a member's home.

(group theory) A mapping of a mathematical group to the permutations of an object that is compatible with the group operation.

The subgroup of a specified group generated by the larger group's commutators.

(group theory) Any (often, but not necessarily, abelian) group whose binary operation is called addition.

Any of several small groups of people, at a conference etc., who concentrate effort on a part of the main topic.

(in an experiment) The group of test subjects left untreated or unexposed to some procedure and then compared with treated subjects in order to validate the results of the test.

(algebra) Given ring R with identity not equal to zero, and group G=g_1,g_2,...,g_n, the group ring RG has elements of the form a_1g_1+a_2g_2+...+a_ng_n (where a_i isin R) such that the sum of a_1g_1+a_2g_2+...+a_ng_n and b_1g_1+b_2g_2+...+b_ng_n is (a_1+b_1)g_1+(a_2+b_2)g_2+...+(a_n+b_n)g_n and the product is ∑ₖ₌₁ⁿ(∑_(g_ig_j=g_k)a_ib_j)g_k.