Tag Archives: Dan Margalit

Picard Groups of Moduli Stacks update

A tiny update on this post. I was chatting with Benson and realized that I may as well ask him directly for a presentation of the mapping class group of a genus two surface. Perhaps unsurprisingly, it can be found … Continue reading

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Picard Groups of Moduli Stacks

Here are some algebraic geometry musings related to the last post, most of which is hopefully correct. Everything below is secretly over \mathbf{Z}[1/6] but I think one may as well think about what is happening over \mathbf{C}. Warning: I don’t … Continue reading

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