3 problems

Let $\bm A$ be a measurement matrix and let $\bm x\in\mathbb{C}^n_s$ be an $s$-sparse complex signal. In phase-less measurements, one observes … where recovery is considered exact…

Let $\spr$ denote sparse phase retrieval with a $k$-sparse signal, and let $n$ be the sample size. Sparse phase retrieval computational infeasibility conjecture. Sparse phase retri…

Information-theoretical gap conjecture. There is an information-theoretical gap between the degree of freedom of ${\boldsymbol x}$ and the actual required sample size.