2 problems

Let $\pi:{{{{{{{{\mathcal M}}}}}}}}\rightarrow S$ be a deformation of a smooth complex projective variety $M_0$ over a smooth germ $(S,0)$, and write $M_s=\pi^{-1}(s)$. Let…

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