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Mathematics, 13.07.2019 19:20 KillerSteamcar

Problem 4.1. let a, b and c be non-empty sets, r a relation from a to b, and s a relation from b to c. (1) prove dom(s r) c dom(r). (2) find a concrete counterexample for the statement dom(so r) = dom(r) . hint. (1) let x dom(so r). (and all you need to do is to show x e dom (r) .) (2) give a counterexample with concrete a, b, c, r and s. 21 .ah +hat

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Problem 4.1. let a, b and c be non-empty sets, r a relation from a to b, and s a relation from b to...
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