centralizer
31Component (group theory) — In mathematics, in the field of group theory, a component of a finite group is a quasisimple subnormal subgroup. Any two distinct components commute. The product of all the components is the layer of the group. For finite abelian (or nilpotent)… …
32Extra special group — In group theory, a branch of mathematics, extra special groups are analogues of the Heisenberg group over fields of prime order p .DefinitionRecall that a finite group is called a p group if its order is a power of a prime p . A p group G is… …
33Janko group J3 — In mathematics, the third Janko group J3, also known as the Higman Janko McKay group, is a finite simple sporadic group of order 50232960. Evidence for its existence was uncovered by Zvonimir Janko, and it was shown to exist by Graham Higman and… …
34Multipliers and centralizers (Banach spaces) — In mathematics, multipliers and centralizers are algebraic objects in the study of Banach spaces. They are used, for example, in generalizations of the Banach Stone theorem. Definitions Let (X, ||·||) be a Banach space over a field K (either …
35Multiplier algebra — In C* algebras, the multiplier algebra, denoted by M(A), of a C* algebra A is a unital C* algebra which is the largest unital C* algebra that contains A as an ideal in a non degenerate way. It is the noncommutative generalization of Stone–Čech… …
36Completion (oil and gas wells) — This article is about the oil or gas well completion. For other uses of completion, see Completion (disambiguation) In petroleum production, completion is the process of making a well ready for production (or injection). This principally involves …
37CA-group — In mathematics, in the realm of group theory, a group is said to be a CA group or centralizer abelian group if the centralizer of any nonidentity element is an abelian subgroup. Finite CA groups are of historical importance as an early example of …
38Component theorem — In the mathematical classification of finite simple groups, the component theorem of Aschbacher (1975, 1976) shows that if G is a simple group of odd type, and various other assumptions are satisfied, then G has a centralizer of an… …
39Depth of noncommutative subrings — In ring theory and Frobenius algebra extensions, fields of mathematics, there is a notion of depth two subring or depth of a Frobenius extension. The notion of depth two is important in a certain noncommutative Galois theory, which generates Hopf …
40Diagonalizable group — In mathematics, an affine group is said to be diagonalizable if it is isomorphic to a subgroup of Dn, the group of diagonal matrices. A diagonalizable group defined over k is said to split over k or k split if the isomorphism is defined over k.… …
