Show that any conjugate pair of complex numbers (with non-zero imaginary part) cannot be the spectrum of any 2x2 matrix with real, nonnegative entries
53123
Trying to derive a contradiction with this simple inequality,
92595
A problem regarding the in-equality of complex numbers .
54628
Properties of non-zero symmetric bilinear form
99384
What are the Complex (Non-Real) Eigenvectors of $3\times 3$ Rotation Matrices?
158724
Show that $B$ is diagonalizable if If $AB=BA$ and $A$ has distinct real eigenvalues
127620
Matrix exponential of a traceless $2\times2$ complex matrix
129977
Prove that $\lambda_1^2$, $\lambda_1\lambda_2$ and $\lambda_2^2$ are eigenvalues of matrix $A$
116495
How to eliminate the zero real part of a purely imaginary number?
2348
Show that the sphere, S, and $\mathbb{R}^2$ is not homeomorphic
150376
Does Real Eigenvalues mean it is an hermitian Matrix
75104
Existence of some type matrix
80544
Need verification - Prove a Hermitian matrix $(\textbf{A}^\ast = \textbf{A})$ has only real eigenvalues
11710
How to show that $\mathbb{Q}$ is not $G_\delta$
125569
Prove that the eigenvalues of a real symmetric matrix are real
41436
rank of complex conjugate transpose matrix property proof
88474
$\mathbb{A}^{2}$ not isomorphic to affine space minus the origin
142307
Counting invertible $0$-$1$ matrices that remain invertible under negating the diagonal