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Mathematics
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ghc1997
  • Member for 8 years, 9 months
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Top posts

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15
Subgroup of $\mathbb{Q}^2$ with no elements that are infinitely prime-divisible
Feb 24
7
Given a finitely generated, residually finite, non-cohopfian group $G$, can the following abelianizations ALL be finite?
Apr 9, 2022
6
Multiply an integer polynomial with another integer polynomial to get a "big" coefficient
Nov 4, 2023
6
Permuting subgroups with the same finite index
Apr 3, 2022
6
When is the group ring $\mathbb{Z}[G]$ a GCD domain?
Jul 21, 2025
6
Smallest $i$ such that $n \Bigm| |\mathrm{GL}(i, p)|$
Jul 18, 2025
5
Can a residually soluble group with an element of infinite order have all its derived quotients finite and non-trivial?
Feb 11
5
When can a matrix be expressed as a commutator?
May 20, 2025
5
If $f(x)$ is a monic polynomial in ${\mathbb Z}[x]$ and all roots have absolute value 1 , then all roots are roots of unity.
May 17, 2023
4
Show that this wreath product is representable by matrices.
Mar 20, 2024

Top network posts

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17
Multiply an integer polynomial with another integer polynomial to get a "big" coefficient
16
A "simpler" description of the automorphism group of the lamplighter group
10
Can the intersection of all finite index subgroups of a soluble group be finitely generated and non-trivial?
7
Given a rational matrix $Q$, can we generate $\langle Q^{i}(v)\mid i\in\mathbb Z,v\in\mathbb Z^{2}\rangle$ using only non-negative powers of a matrix?
6
The classification of finitely generated modules over the ring of (Laurent polynomials in multiple variables)