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seen Oct 15 at 21:34

Apr
9
comment What is the tangent plane equation on the 3 spheres?
Oh, I see. I'm being dim today.
Apr
3
comment Minimal axioms for a group
Thanks, Arturo. This is one of those things that I'd been wondering about every now and then, but I never thought of it when I was in the same room as Sarah's copy of Herstein.
Apr
3
comment Minimal axioms for a group
Ugh. Thanks, Chris. I'd even been looking at that example, but just not making the leap from "everything is an identity" to "therefore, everything is an inverse".