Matrix Extreme Points and Free extreme points of Free spectrahedra

Aidan Epperly, Eric Evert, J. William Helton +1

A spectrahedron is a convex set defined by a linear matrix inequality, i.e., the set of all $x\in {\mathbb{R}}^g$ such that \[ L_A(x) = I + A_1 x_1 + A_2 x_2 + \dots + A_g x_g \succ…