3 problems

Convergence of SVS-SPRING for LLQ. Under these assumptions and the SVS$(J,k,\lambda)$ sampling distribution, SPRING should satisfy the displayed convergence bound, where the hidden…

Let $\boldsymbol{A}\in\mathbb{R}^{m\times n}$ be the least-squares matrix, and let $\boldsymbol{R}$ be computed from $\boldsymbol{A}$ by sketching and $\textsf{QR}$ factorizing the…

Non-negative least-squares column-exclusion conjecture. There exists at least one column ${\bf g}_*$ of $G$ such that $\hat{\bf x}$ has non-negative entries.