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Results tagged with combinatorial-group-theory
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user 66413
1
vote
0
answers
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Intuitive meaning of benign subgroup
Disclaimer! This is a copy of a question I posted on M.SE!
I still think the question belongs there but I'm not getting any answers so I'm dublicating with slight changes:
I've been studying a proof o …
- 373
12
votes
Why is "The Higman Rope Trick" thus named?
Well, Sam Nead and Flounderer got it right but in different ways... :-)
I took up Sam's idea and asked Schupp directly.
He said Flounderer was right, and I'll quote:
"The answer on mathoverflow is exa …
- 373
14
votes
2
answers
768
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Why is "The Higman Rope Trick" thus named?
I'm studiyng Higman's Embedding Theorem, and a fundamental part of the proof is the following lemma:
If R is a benign normal subgroup of finitely generated group F, then F/R can be embedded in a finit …
- 373