Is $A$ similar to $A^T$
42761
Matrix is conjugate to its own transpose
15793
Is the formula $(\text{ker }A)^\perp=\text{im }A^T$ necessarily true?
34714
What is the relationship between $\ker(A), \ker(A^2), \ldots, \ker(A^n)$?
79276
Find $\min(\operatorname{trace}(AA^T))$ for invertible $A_{n\times n}$
158082
Is $\|A^n\|=\|A\|^n$ true for any normal operator in a Hilbert space?
120933
A is similar to $A^k$, then each eigenvalue of $A$ is a root of unity
139685
If $A^2$ and $B^2$ are similar matrices, do $A$ and $B$ have to be similar?
107842
Behaviour of ($\overline{a}_n)_{n=1}^{\infty}$ and ($\underline{a}_n)_{n=1}^{\infty}$
5250
Are $T\mathbb{S}^2$ and $\mathbb{S}^2 \times \mathbb{R}^2$ different?
109674
If $(I-T)^{-1}$ exists, can it always be written in a series representation?
126711
What is the square matrix $A$ equal to if $A=A^2$
77891
$(U\circ T)^{*} = T^{*}\circ U^{*}$
61538
Given a square matrix $A$, both $AA^T$ and $A^TA$ are symmetric
78307
Under what conditions is $AA^T$ invertible?
153406
$[F(t):F(t^n)]=n$ where $t$ is trascendental
136329
A matrix is similar to its transpose
30923
Is the matrix $A^*A$ and $AA^*$ hermitian?