number theory
摘要:
read Sec. 1.1-1.3; Sec.3.5 1. natural numbers自然数 N:{0,1,2. . .} integers整数 Z:{. . .-1,0,1,2. . .} positive integers:正整数,不包含0 rational numbers(fraction 阅读全文
posted @ 2019-09-22 16:08 Eleni 阅读(198) 评论(2) 推荐(0) 编辑