3 problems

Let $utext{?}$ and $u$? No. Let $beta$?

Let $\Omega$ be an ellipse with boundary $\Gamma$ of length $2L$, and let $s$ denote the curvilinear coordinate. Let $\lambda_1(h)$ and $\lambda_2(h)$ be the first two eigenvalues,…

Magnetic Neumann-wedge bound-state conjecture. For every aperture $\phi\in(0,\pi)$,