Vol. 4, No. 1, 2010

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The Picard group of $\mathscr M_{1,1}$

William Fulton and Martin Olsson

Vol. 4 (2010), No. 1, 87–104
Abstract

We compute the Picard group of the moduli stack of elliptic curves and its canonical compactification over general base schemes.

Keywords
moduli spaces, stacks, Picard group
Primary: 14D22
Secondary: 14D05