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Results tagged with ag.algebraic-geometry
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user 43299
Algebraic varieties, stacks, sheaves, schemes, moduli spaces, complex geometry, quantum cohomology.
0
votes
1
answer
282
views
Group of Hodge classes
I would like to know if there exists a relation between $ \mathrm{Hdg}_k(X \bigcup Y ) $, $ \mathrm{Hdg}_k(X) $, $ \mathrm{Hdg}_k( Y) $ and $ \mathrm{Hdg}_k(X \bigcap Y )$ ( short exact sequence, or …
- 11
-3
votes
1
answer
1k
views
Chow groups and short exact sequence
Let $X$ and $Y$ be subvarieties of a smooth projective variety $M$ such that $M=X \bigcup Y$. Can you explain to me why $ A_k ( X \bigcap Y ) \to A_k ( X ) \oplus A_k ( Y ) \to A_k ( X \bigcup Y ) \to …
- 11