Diagonalizable of $A=A^T$
21571
Why are real symmetric matrices diagonalizable?
61274
If $AA^T$ is the zero matrix, then $A$ is the zero matrix
61538
Given a square matrix $A$, both $AA^T$ and $A^TA$ are symmetric
17391
Diagonalisation and characteristic polynomial
28003
How to prove $A+ A^T$ symmetric, $A-A^T$ skew-symmetric.
33477
Proving that if $A$ is a $8\times 8$ matrix over $\mathbb{R}$ and $A^3=A$, then $A$ is diagonalizable.
133756
Geometric interpretation of $\det(A^T) = \det(A)$
128453
If $A$ has two eigenvalues $\lambda _1, \lambda_2$ and $\dim (E_{\lambda_1})=n-1$, then $A$ is diagonalizable
80751
diagonalisability of matrix few properties
125195
If matrix A is invertible, is it diagonalizable as well?
20110
How to prove $(AB)^T=B^T A^T$
80022
Eigenvector of A by $A^2$
74532
Solve for $ A $ from $ A {A}^{T} $
131701
Why is $A^TA$ invertible if $A$ has independent columns?
86919
When (and more importantly, why) does $AA^T$ have an inverse?
68238
Diagonalisable or not?
63475
Is there any connection between a matrix being invertible and being diagonalizable?