semigroup

名词 n.
中文释义

英文释义

名词 n.
  1. Any set for which there is a binary operation that is closed and associative.
    — If a semigroup S contains a zeroid, then every left zeroid is also a right zeroid, and vice versa, and the set K of all the zeroids of S is the kernel of S.

词形变化

semigroups plural

词源

From semi- + group, reflecting the fact that not all the conditions required for a group are required for a semigroup. (Specifically, the requirements for the existence of identity and inverse elements are omitted.)
0 次浏览 数据来源: Wiktionary