Tag: matrices
- Eigenvalues of symmetric tridiagonal matrices with complex entries
- Show $\nabla f=A\nabla g$ by chain rule
- Fréchet derivative of a matrix expression
- Upper bound on least eigenvalue of a graph
- Maximize sum of $(x_1+\dots+x_k)^2$ on the unit $n$-sphere
- Proving that the norm $n \|A\|_{l_\infty}$ is a matrix norm.
- Construct a matrix given column and null spaces
- Monotonicity of Frobenius norm
- Let $A,B$ be $2$ square matrices such that $A+AB-2B=0$. Prove $2$ isn’t an eigenvalue of $A$.
- Linear Algebra – Problem 2.4, Chapter 3 from Artin Explained