自然投影[Natural Projection] - 达人(其实～我是卧底，来自外星)

2005/08/11 | 自然投影[Natural Projection]
类别(∑〖数学〗) | 评论(0) | 阅读(27) | 发表于 20:28: The natural projection, also called the homomorphism, is a logical way of mapping an algebraic structure onto its quotient structures. The natural projection is defined formally for groups and rings as follows.
For a group, let . is defined by . Note (Dummit and Foote 1998, p. 84).
For a ring, let be an ideal of a ring . is defined be . Note (Dummit and Foote 1998, p. 244).; 0