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Algebraic varieties, stacks, sheaves, schemes, moduli spaces, complex geometry, quantum cohomology.
8
votes
1
answer
639
views
Phantoms and strongly exceptional collections
I would like to ask a question about phantom categories and strongly exceptional collections.
Let $X$ be a smooth prpjective variety over an algebraically closed field. An admissible subcategory $B …
3
votes
How to define the intersection multiplicity of a projective variety and a complete intersect...
I think it is difficult to compute the multiplicity just by looking "qualitatively" at the equations.
For instance, let $C \subset \mathbb{P}^3$ be a smooth curve over the field of complex numbers.
…