Matrix multiplication commutativity
4280
A linear operator commuting with all such operators is a scalar multiple of the identity.
121062
Given a matrix, is there always another matrix which commutes with it?
108567
Nielsen & Chuang Exercise 2.2 - “Matrix representations: example”
1906
Multiplying by a $1\times 1$ matrix?
106540
Is this binary operation commutative?
57916
Transpose of product of matrices
102935
Trace and determinant of composition of a left-multiplication and a right-multiplication on a space of matrices
123410
Find dimension of Commuting matrices over field of prime elements
6398
Can the product of an $4\times 3$ matrix and a $3\times 4$ matrix be invertible?
41436
rank of complex conjugate transpose matrix property proof
49977
Show that the collection of matrices which commute with every idempotent matrix are the scalar matrices
8970
Proving the cross product matrix tranformation identity with an alternative solution
136389
Finding an isomorphic subring of matrices
114271
Why is a matrix invertible if it can be written as the product of elementary matrices?
66092
Simultaneous diagonalization of commuting linear transformations
87636
A Product function for matrix products
112216
Geometric description of canonical commutation relation