4 problems

Let $\Gamma$ be a smooth surface, and let $\mathcal I+\mathcal R_{\text{LB}}$ denote the integral operator in, where $\mathcal R_{\text{LB}}$ is the composition of the Laplace–Belt…

Let $A$ be the discretized integral operator in the referenced two- or three-dimensional models, and let $T^{-1}_{\text{Schwarz}}$ be the Schwarz preconditioner associated with the…

Volterra–Grunwald–Letnikov equivalence conjecture. Theorem 5, which asserts equivalence of these equations under the stated continuity and zero-initial-condition hypotheses, is val…

Three-variable kernel conjecture. If $\alpha\notin\{1/3,2/3\}$, then $f=0$ almost everywhere. If $\alpha=1/3$, then, almost everywhere,