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Results tagged with terminology
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user 20803
Questions of the kind "What's the name for a X that satisfies property Y?"
6
votes
1
answer
1k
views
Who coined "mob" and "clan" and why these words?
A mob is a word used for a topological semigroup which is a Hausdorff space. A clan is a compact connected mob with a two-sided identity element.
Who used these words with these meanings first and wh …
- 1,445
51
votes
3
answers
12k
views
How did "normal" come to mean "perpendicular"?
How and when did the word "normal" acquire this meaning? When I first thought of this, I couldn't really come up with any explanation that wasn't complete speculation -- pretty much all I was able to …
- 1,445
1
vote
2
answers
371
views
What are the monoids in which every globally idempotent subsemigroup contains the identity e...
A semigroup is called globally idempotent when for any $x\in S$ there are $y,z\in S$ such that $x=yz$.
Is there a name for monoids whose every globally idempotent subsemigroup contains the identity e …
- 1,445