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Algebraic varieties, stacks, sheaves, schemes, moduli spaces, complex geometry, quantum cohomology.
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higher dimensional analogues of the Manin-Drinfeld theorem
The Manin-Drinfeld theorem asserts that a divisor on the compact modular curve $X_0(N)$ which is supported on the cusps is torsion.
Equivalently, if $Y_0(N)$ is the open modular curve, the mixed Hod …
1
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0
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another question on the Manin-Drinfeld theorem
A few days ago I asked a question about possible higher dimensional generalizations of the Manin-Drinfeld theorem. Let me come back to the classical statement.
It says that a divisor on the modular …