Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
1995-11-22
Nucl.Phys. B471 (1996) 293-308
Physics
High Energy Physics
High Energy Physics - Theory
18 pages, plain TeX. Revised derivation of $\Delta^*$ system of equations; version to appear in Nuclear Physics B
Scientific paper
10.1016/0550-3213(96)00149-6
The periods of the three-form on a Calabi-Yau manifold are found as solutions of the Picard-Fuchs equations; however, the toric varietal method leads to a generalized hypergeometric system of equations which has more solutions than just the periods. This same extended set of equations can be derived from symmetry considerations. Semi-periods are solutions of this extended system. They are obtained by integration of the three-form over chains; these chains can be used to construct cycles which, when integrated over, give periods. In simple examples we are able to obtain the complete set of solutions for the extended system. We also conjecture that a certain modification of the method will generate the full space of solutions in general.
Avram A. C.
Derrick E.
Jancic Dubravka
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