Direct sum of matrices
47103
How to form a block-diagonal matrix from a list of matrices?
31326
Number of $(0,1)$ $m\times n$ matrices with no empty rows or columns
13948
Matrix in a matrix
158264
Rotation of Matrices and their interpretation
33955
Geometric series of matrices
113628
Where M is a matrix calculate a formula for M^n
138610
How do I divide the columns of a matrix by the sum of its elements?
109573
Is sum of two orthogonal matrices singular?
54740
Proofs of Determinants of Block matrices
8970
Proving the cross product matrix tranformation identity with an alternative solution
37117
Sum of positive definite matrices still positive definite?
87136
All matrices which commute with all $2\times 2$ matrices
132913
Sum of two eigenvectors for different eigenvalues
123044
Commutative matrices are multiples of the identity
18373
Can infinite-dimensional vector spaces be decomposed into direct sum of its subspaces?
109675
Finite sum of eigenspaces (with distinct eigenvalues) is a direct sum
18023
The direct sum $\oplus$ versus the cartesian product $\times$