Number of matrices satisfying a given property
123726
$2\times 2 $ matrices over $\mathbb{C}$ that satisfy $\mathrm A^3=\mathrm A$
79925
Infinitely many values of $x$ that satisfy the equations
82295
Showing that the minimal polynomial of an $n \times n$ matrix has degree at most $n$ without using the Cayley-Hamilton Theorem
25357
Matrices $B$ that commute with every matrix commuting with $A$
39746
How to prove that given set is a connected subset of the space of matrices?
45111
Number of Subspaces that contains other Space
116823
VERIFYING: Proving an $n \times n$ Matrix Vector Space
52564
$m\times n$ matrix with an even number of 1s in each row and column
117862
Number of partitions of an $n$-element set into $k$ classes
44898
Help with commutative property of matrices problem
120744
How many $n\times m$ binary matrices are there, up to row and column permutations?
57954
How many transitive relations on a set of $n$ elements?
28402
Number of bases of an n-dimensional vector space over q-element field.
141173
Are there matrices such that $AB=I$ and $BA \neq I$
26343
Number of certain (0,1)-matrices, Stanley's Enumerative Combinatorics
21758
Rank of the $n \times n$ matrix with ones on the main diagonal and $a$ off the main diagonal
123808
How would I solve the following problem involving elementary matrices?