We give a generalization to stacks of the classical theorem of Petri - i.e., we give a presentation for the canonical ring of a stacky curve. This is motivated by the following application: we give explicit presentations of various rings of modular forms. This is joint work with John Voight.
Note:
Refreshments at 3:45PM.
Speaker: David Zureick-Brown
Institution: Amherst College
Webpage: https://dmzb.github.io/
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