Let $$ Y \subset X $$ be a codimension 2 or greater smooth subvariety of a smooth projective variety $X$. Is there a relation between the cohomology of the blowup $Bl_Y(X)$ and the cohomology rings of $X,Y$?
2026-03-26 04:36:21.1774499781
Is there a relation between the cohomology ring of a blowup with the base scheme and blowup locus?
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