2 problems

The polystability criterion. There exists a $Z$-positive solution $h\in\mathcal{H}^+(E)$ of the $Z$-critical equation if and only if $E=\bigoplus_i E_i$ is $Z$-polystable and every…

The $Z$-critical correspondence. There exists a $Z$-positive solution of the $Z$-critical equation if and only if $E$ is $Z$-stable, where $Z$-stability means that for every cohere…