2 problems

Let $\boldsymbol{\upsigma}=\widehat{\boldsymbol{\upsigma}}(\log\mathbf{V})$, where $\mathbf{V}$ is the left stretch tensor, and consider the true-stress-true-strain monotonicity co…

Let $U$ be the right stretch tensor and let $K_2^2=\|\operatorname{dev}_n\log U\|^2$. Global TSTS-M$^+$ nonexistence conjecture. For $n=2,3$, there is no elastic energy of the form…