Noun
A device used to centralize a piece of equipment.
(mathematics) (of an element in a group) The set of elements of the same group which commute with the element. See also normalizer.
Source: en.wiktionary.orgThe problem is to prove that the 2-layer of the centralizer of an involution in a simple group is semisimple. Source: Internet
The problem is to show that if a group has a centralizer of involution in "standard form" then it is a group of Lie type of odd characteristic. Source: Internet
Any centralizer in a division ring is also a division ring. Source: Internet