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Igor Belegradek
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Does every group with a finite classifying space have finitely generated center?

Remarks:

  1. If $G$ is a finitely generated group with infinitely generated center $Z(G)$, then the quotient $G/Z(G)$ is not finitely presented (as follows from a result of B.H Newmann).

  2. Finite classifying space means that the group is the fundamental group of a finite aspherical cell complex.

  3. I suspect the above question is a well-known open problem, but cannot find it stated in the literature, so a reference would be appreciated.

  4. Alperin-Shalen (Inventiones, 1982) showed that the answer is yes for every subgroup of $GL_n(K)$ where $n>0$ and $K$ is a field of characteristic zero.

  5. The answer is also yes for elementary amenable groups. (I know a proof, but have no reference).

Does every group with a finite classifying space have finitely generated center?

Remarks:

  1. Finite classifying space means that the group is the fundamental group of a finite aspherical cell complex.

  2. I suspect the above question is a well-known open problem, but cannot find it stated in the literature, so a reference would be appreciated.

  3. Alperin-Shalen (Inventiones, 1982) showed that the answer is yes for every subgroup of $GL_n(K)$ where $n>0$ and $K$ is a field of characteristic zero.

  4. The answer is also yes for elementary amenable groups. (I know a proof, but have no reference).

Does every group with a finite classifying space have finitely generated center?

Remarks:

  1. If $G$ is a finitely generated group with infinitely generated center $Z(G)$, then the quotient $G/Z(G)$ is not finitely presented (as follows from a result of B.H Newmann).

  2. Finite classifying space means that the group is the fundamental group of a finite aspherical cell complex.

  3. I suspect the above question is a well-known open problem, but cannot find it stated in the literature, so a reference would be appreciated.

  4. Alperin-Shalen (Inventiones, 1982) showed that the answer is yes for every subgroup of $GL_n(K)$ where $n>0$ and $K$ is a field of characteristic zero.

  5. The answer is also yes for elementary amenable groups. (I know a proof, but have no reference).

Source Link
Igor Belegradek
  • 29.1k
  • 2
  • 80
  • 176

Groups with finitely generated center

Does every group with a finite classifying space have finitely generated center?

Remarks:

  1. Finite classifying space means that the group is the fundamental group of a finite aspherical cell complex.

  2. I suspect the above question is a well-known open problem, but cannot find it stated in the literature, so a reference would be appreciated.

  3. Alperin-Shalen (Inventiones, 1982) showed that the answer is yes for every subgroup of $GL_n(K)$ where $n>0$ and $K$ is a field of characteristic zero.

  4. The answer is also yes for elementary amenable groups. (I know a proof, but have no reference).