4 problems

Let $X$ be the Calabi–Yau threefold in the paper, and let $\mathcal{M}$ be the moduli stack of objects $E\in D^b\operatorname{Coh}(X)$ satisfying … For $[E]\in\mathcal{M}$, let $G$…

Let $X$ be a fixed smooth projective variety and let $n$ be a positive integer. For a commutative differential graded algebra $A$, let $\mathbb{R}\underline{Vect}_{n}(X)(A)$ be the…

Let $\mathcal{M}$ be the moduli stack of objects $E\in D^b\operatorname{Coh}(X)$ satisfying $\operatorname{Ext}^{<0}(E,E)=0$, and let $G$ be a maximal reductive subgroup of…

Buchweitz–Flenner semiregularity conjecture. The whole obstruction space to deforming $\mathscr{F}$ lies in the kernel of $\sigma_q$ for all $q$.