the closure of subgroup of $\mathrm{GL}(n,\mathbb{R})$ is a subgroup?
122821
Is the following proof valid? About the closure of a subgroup, of a topological group, being again a subgroup
27670
Group homomorphisms $\mathbb{Q}\to\mathbb{R}$
106277
Prove that $G$ contains a subgroup $H_i$ for each $i\in\Bbb Z$ with $\dots\subset H_{−2}\subset H_{−1}\subset H_0\subset H_1\subset\dots?$
119758
On the order of elements of $\mathrm{GL}(2,q)$.
51747
Showing that the intersection of all subgroups of order $n$ is normal
23037
Computing the order of $\mathrm{SL}_2(\mathbb F_p)$ as the kernel of $\mathrm{GL}_2(\mathbb F_p)$
138297
Let $G = GL_2\mathbb (R)$. Show that $T$ is a subgroup of $G$
110390
Order of group $GL_{2}\left( \mathbb{F}_{p}\right) $
29269
fundamental group of $GL^{+}_n(\mathbb{R})$
2064
Finite subgroups of orthogonal transformations in $\mathbb{R}^3$
151559
Please help: How to show that Aut(G) is a subgroup of Sym(G)
43759
Prove that the set $\mathrm{Aut}(G)$ of all automorphisms of the group $G$ with the operation of taking the composition is a group
130937
Embeddings of finite groups into $\mathrm{GL}_n(\mathbb{Z})$
128652
Subgroups of $\mathbb Z \times(\mathbb Z/n\mathbb Z)$
151210
How can we find and categorize the subgroups of $\mathbb{R}$?
104505
Is every normal subgroup the kernel of some endomorphism?
154241
What is the easiest way to generate $\mathrm{GL}(n,\mathbb Z)$?