作者mqazz1 (无法显示)
看板Math
标题[离散] 二元关系
时间Sun Apr 3 18:54:20 2011
for each of the following relations,
determine whether the relation is
reflexive, symmetric, antisymmetric, or transitive
(1) R is the relation on Z+ where aRb if gcd(a,b)=1
(2) R is the relation on Z+ where xRy if x^3 + y^2 is even
请问这两个要怎麽判断呢?
谢谢
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