Having to do with group theory.

plural of group theoretician

(rare) A group theorist.

Having to do with group theory.

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

(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.

(Internet) A group of people who meet and chat online, especially in a chat room

(Internet) An online discussion group.

The behaviour of a group of people governed by their mutual interaction. / The study of this behaviour.

(group theory) For given n and field F (especially where F is the real numbers), the group of n × n orthogonal matrices with elements in F, where the group operation is matrix multiplication.