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19972005
most citedCycle Classes of the E-O Stratification on the Moduli of Abelian Varieties

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math.AG2002

An invariant for varieties in positive characteristic

G. van der Geer, T. Katsura

We introduce an invariant of varieties in positive characteristic which generalizes the a-number of an abelian variety. We calculate it in some examples and discuss its meaning for…