Dimension of of the subspace formed by all matrices which commute with a given matrix
73773
$C(M)=\{A\in M_n(\mathbb{C}) \mid AM=MA\}$ is a subspace of dimension at least $n$.
12213
Similarity of real matrices over $\mathbb{C}$
32064
Zero-dimensional matrices
116823
VERIFYING: Proving an $n \times n$ Matrix Vector Space
128760
If $A$ and $B$ two $n\times n$ matrix such that $AB=BA$, then $\dim(A\cap B)$?
70021
Verify if symmetric matrices form a subspace
111911
Dimensions of symmetric and skew-symmetric matrices
124786
Prove that V contains a subspace of each dimension
38516
Show a subset is subspace of a vectorspace and find the dimension
33642
Finite dimensional subspace of $C([0,1])$
101631
Determinant of a finite-dimensional matrix in terms of trace
146455
Compactness of the set of all unitary matrices in $M_2(\mathbb{C})$
139951
Direct Sum of vector subspaces
106097
Spectrum of the sum of two commuting matrices
92774
Prove that a linear subspace of $C([0,1])$ is closed
141674
Given $n$ linear functionals $f_k(x_1,\dotsc,x_n) = \sum_{j=1}^n (k-j)x_j$, what is the dimension of the subspace they annihilate?
2109
Max dimension of a subspace of singular $n\times n$ matrices