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Questions about the branch of algebra that deals with groups.

7 votes
1 answer
389 views

Status of the Isomorphism problem for automatic groups?

I only ask because I don't know how to look for the answer.
some guy on the street's user avatar
3 votes

Associativity with infinite nesting

First, it's important that the infinite connect sum $A\# B\#A\#\cdots$ is not the limit of the finite connect sums $A,A\#B, A\#B\# A,\dots$; in fact, I'm sure the binary connect sum is as wrong a nota …
some guy on the street's user avatar