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Results tagged with gr.group-theory
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user 76299
Questions about the branch of algebra that deals with groups.
11
votes
1
answer
1k
views
The set of subgroups of $F_2$
This question came up in our algebraic topology class and our Professor didn't know the answer. I also couldn't find an answer so far.
What is the cardinality of the set of subgroups of $F_2$?
H …
- 2,303
8
votes
1
answer
242
views
Finite group such that $K_{-1} (\mathbb Z G)$ has non-trivial torsion
According to Carters Lower K-theory of finite groups for a finite group $G$ we have
$$ K_{-1} (\mathbb Z G) = \mathbb Z^r \oplus \mathbb Z_2^s $$
where $s$ is the sum over all irreducible representati …
- 2,303