On generalized Sethi-Vafa-Witten formulas

Details On generalized Sethi-Vafa-Witten formulas On generalized Sethi-Vafa-Witten formulas

2011-03-30

arxiv.org/abs/1103.6066v4

Mathematics

Algebraic Geometry

Scientific paper

We present a formula for computing proper pushforwards of classes in the Chow ring of a projective bundle under the projection $\pi:\Pbb(\Escr)\rightarrow B$, for $B$ a non-singular compact complex algebraic variety of any dimension. Our formula readily produces generalizations of formulas derived by Sethi,Vafa, and Witten to compute the Euler characteristic of elliptically fibered Calabi-Yau fourfolds used for F-theory compactifications of string vacua. The utility of such a formula is illustrated through applications, such as the ability to compute the Chern numbers of any non-singular complete intersection in such a projective bundle in terms of the Chern class of a line bundle on $B$.

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