Mathematics – Algebraic Geometry
Scientific paper
2007-10-18
Mathematics
Algebraic Geometry
Scientific paper
In this note we give a numerical criterion that expresses the condition that
an abelian variety be simple in terms of an invariant that is closely related
to the s-invariant of Ein-Cutkosky-Lazarsfeld. The criterion yields new
examples where s-invariants are irrational. It may also be viewed as a
statement about the geometry of the ample cone.
Bauer Thomas
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