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2025-11-02 11:53:40 UTC
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Jean Abou Samra (new account) on Nostr: nprofile1q…xaamk I'm ashamed to admit it, but: It holds in an arbitrary commutative ...

I'm ashamed to admit it, but:

It holds in an arbitrary commutative ring (no assumptions like being a domain) that if a and b are not units then ab is not a unit.

(After I did the proof, I concluded that this was the right time to stop my work day.)