@Kerapace But at this stage in the game, most/all the proofs should be pretty short. Finger exercises.
@Kerapace Yeah, Z[x] is a UFD but not a PID. Always good to build a toolkit of go-to examples to get hands-on with.
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. Banned in Sweden. SubGenius, Zhuangist, white-hat troll. Defrocked mathematician. Brain problems.