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Mahtab
  • Member for 1 year, 2 months
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4 votes
1 answer
391 views

Homotopy groups of mapping cylinder

3 votes
1 answer
202 views

Assigning a finite number, $n(G)$, to a finite group $G$ with this property

3 votes
0 answers
122 views

Assigning a finite number, $n(G)$, to an elementary amenable group $G$ with $\operatorname{cd}G<\infty$

2 votes
0 answers
89 views

proper retract of a limit group

1 vote
0 answers
87 views

Is there such a function for the class of finitely presented groups?

1 vote
0 answers
52 views

The number of $n$-cells attaching to $K^{n-1}$ in Wall's construction

1 vote
0 answers
60 views

How can we construct a non-trivial central extension of a Lie group

1 vote
1 answer
75 views

The stabilizer of a point in the connected Lorentz group

1 vote
1 answer
99 views

A correspondence between projective representations of $G$ with those of its universal cover

1 vote
0 answers
45 views

Some details about relationship between central charges and second cohomology group of the Lie algebra

0 votes
0 answers
50 views

Some details about Kirillov-Kostant Poisson bracket

0 votes
0 answers
61 views

A reference for this statement (representations of universal central extensions)

0 votes
0 answers
27 views

Why $d\mu (q)\delta (k,q)$ is $G$-invariant?

0 votes
0 answers
61 views

A question on projective unitary representation of a Lie group