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Formal complex manifold without dd^c
Is there an example of compact complex manifold, which is formal, but does not admit complex structure satisfying $dd^c$-lemma?
4
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cohomology of configuration space of punctured variety
Given a smooth projective variety $X$ of dimension $l$, we denote with $F(X,n)$ the configuration space of points
$$
F(X,n):=\{(x_{1}, \dots, x_{n})\in X^{n}\: : \: x_{i}\neq x_{j}\text{ for each }i,j ...