Structured random sketching for PDE inverse problems

Ke Chen, Qin Li, Kit Newton +1

For an overdetermined system $\mathsf{Ax}\approx \mathsf{b}$ with $\mathsf{A}$ and $\mathsf{b}$ given, the least-square (LS) formulation $\min_x \, \|\mathsf{A}\mathsf{x}…