2 problems

Let $f$ be $n$-nondegenerate when the set … is dense in $\mathbb R^n$. In the lattice model, suppose that $d^2U^{(2)}/dq^2$ is $n$-nondegenerate for $n$ sufficiently large, where h…

Let the correlators $Q_{\boldsymbol{k}}(t)$, $\Pi_{\boldsymbol{k}}(t)$ and $\Xi_{\boldsymbol{k}}(t)$ describe the Lindblad dynamics of the quantum spherical model after a deep quan…