List questions from spectrahedra | MathQA

A spectrahedron is a quadric cone when matrices in LMI are in $\mathbb{R}^{2\times 2}$

Published on 06 May 2026 - 2:30

Calculation involving determinant of a matrix

Published on 06 May 2026 - 13:37

Is the set of positive definite matrices with trace one an open subset of hermitian matrices?

Published on 25 Mar 2026 - 22:05

Why is the boundary of spectrahedra “more pointy” at matrices of lower rank?

Published on 06 May 2026 - 14:22

Linear matrix inequality and convex epigraph

Published on 06 May 2026 - 11:22

Show that $\{x \mid A_0 + \sum x_i A_i \succcurlyeq 0 \}$ is convex

Published on 06 May 2026 - 12:31