If is a ring, the center of , sometimes denoted , is the set of all elements in that commute with all other elements of . That is,
Note that so the center is non-empty. If we assume that is a ring with a multiplicative unity , then is in the center as well. The center of is also a subring of .
|Date of creation||2013-03-22 12:45:29|
|Last modified on||2013-03-22 12:45:29|
|Last modified by||drini (3)|