3 problems

Let $\sigma$ be the stress, and consider the region on which $|\sigma|=1$. The characteristic lines there may form boundary fans, exterior fans with apex outside $\overline{\O_p}$,…

Arbitrary-solution well-posedness conjecture. The same well-posedness statement holds for any solution, not only for positive solutions. This is described as an even more daring co…

Well-posedness conjecture. For positive solutions of the continuity equations, well-posedness holds whenever