On extensions of the Torelli map

Details On extensions of the Torelli map On extensions of the Torelli map

2011-04-19

arxiv.org/abs/1104.3788v1

Mathematics

Algebraic Geometry

10 pages, 1 figure

Scientific paper

The divisors on $\bar{\operatorname{M}}_g$ that arise as the pullbacks of
ample divisors along any extension of the Torelli map to any toroidal
compactification of $\operatorname{A}_g$ form a 2-dimensional extremal face of
the nef cone of $\bar{\operatorname{M}}_g$, which is explicitly described.

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