Real degeneracy loci of matrices and phase retrieval

Papri Dey, Dan Edidin

Let $\mathcal{A}=\{A_1,\dots ,A_r\}$ be a collection of linear operators on ${\mathbb{R}}^m$. The degeneracy locus of $\mathcal{A}$ is defined as the set of points $x \in {\m…