Show that a matrix is diagonal
66092
Simultaneous diagonalization of commuting linear transformations
36613
Prove that simultaneously diagonalizable matrices commute
97733
Can it be determined that the sum of the diagonal entries, of matrix A, equals the sum of eigenvalues of A
31149
Prove that matrix can be square of matrix with real entries
78265
Diagonalizable matrix with parameters
135316
A basic question on diagonalizability of a matrix
116240
Show a matrix in detail
47103
How to form a block-diagonal matrix from a list of matrices?
73286
Show that the set of all symmetric, real matrices is a subspace, determine the dimension
137920
Proving an equation with invertible matrices
70157
Is every matrix $A$ such that $A^k=I$ diagonalizable?
898
Strictly diagonally dominant matrices are non singular
123803
If $X^n$ is a diagonal matrix with distinct eigenvalues, then is $X$ also a diagonal matrix with distinct eigenvalues?
98646
Show determinant of matrix is non-zero
141015
Proof of orthogonal matrix
97487
How to prove whether a matrix has rank $1$
103537
How to diagonalize this matrix...