Find the center of the group $\operatorname{GL}(n,\mathbb R)$ of invertible $n \times n$ matrices.
7418
The Center of $\operatorname{GL}(n,k)$
125960
Factor groups of matrices
36878
Prove that $\operatorname{SL}(n,\Bbb R)$ is connected.
30637
Exponent of $GL(n,q)$.
40846
When can a (finite) group be written as the quotient of some other group by its center?
78580
Is $SL_n(\mathbb{R})$ a normal subgroup in $GL_n(\mathbb{R})$?
75553
Order of matrices in $GL_2(\mathbb{Z})$
105666
What's an easy way to show that $GL(n,\mathbb C)$ is connected?
94479
What is the center of $D_{2n}/Z(D_{2n})$
147827
How to calculate $|\operatorname {SL}_2(\mathbb Z/N\mathbb Z)|$?
42891
Prove that $Z(G)$ which is the center of $G$ is a subgroup of $G$
23037
Computing the order of $\mathrm{SL}_2(\mathbb F_p)$ as the kernel of $\mathrm{GL}_2(\mathbb F_p)$
105610
Normalizer of upper triangular group in ${\rm GL}(n,F)$
97751
Center of a group ring?
78283
Centralizer of a given element in $S_n$?
114320
Showing that if the center of a group is trivial, then the center of its automorphism group is trivial
29269
fundamental group of $GL^{+}_n(\mathbb{R})$