Is $A^2$ is diagonalizable , then is $A$ diagonalizable when $A$ is non-singular?
30049
If $T^m$ is diagonalizable for a $m\in\mathbb N$, then $T$ is diagonalizable.
124734
If $A^3=O$ is the matrice $A^2-A+I$ invertible?
117293
sufficient and necessary conditions for matrix to be diagonalize or triangular
53863
Making a non-diagonalizable matrix diagonalizable with an small perturbations
135316
A basic question on diagonalizability of a matrix
4952
Let $A$ be a diagonalizable matrix and $\lambda$ be an eigenvalue of A. Prove that rank($\lambda I - A$) = rank(($\lambda I - A)^2$).
30923
Is the matrix $A^*A$ and $AA^*$ hermitian?
31898
Sufficient conditions for $x, Ax, A^2x, ...$ being linearly indepedent
110271
Given a matrix with non-negative real entries, can you algebraically prove that it has a non-negative eigenvalue?
35305
Why is $\mathbb{R}^2$ not a subset and /or a subspace of $\mathbb{R}^3$?
118283
Show that if $A^{n}=I$ then $A$ is diagonalizable.
125195
If matrix A is invertible, is it diagonalizable as well?
131701
Why is $A^TA$ invertible if $A$ has independent columns?
128453
If $A$ has two eigenvalues $\lambda _1, \lambda_2$ and $\dim (E_{\lambda_1})=n-1$, then $A$ is diagonalizable
104374
Diagonalizability of an involution over a Field
59055
Diagonalizable transformation restricted to an invariant subspace is diagonalizable
31116
Matrix given by $a_{ij} = 1/(i+j)$ is non-singular.