Mirror symmetry, Kobayashi's duality, and Saito's duality

Details Mirror symmetry, Kobayashi's duality, and Saito's duality Mirror symmetry, Kobayashi's duality, and Saito's duality

2005-07-07

arxiv.org/abs/math/0507134v1

Mathematics

Algebraic Geometry

Scientific paper

M. Kobayashi introduced a notion of duality of weight systems. We tone this notion slightly down to a notion called coupling. We show that coupling induces a relation between the reduced zeta functions of the monodromy operators of the corresponding singularities generalizing an observation of K. Saito concerning Arnold's strange duality. We show that the weight systems of the mirror symmetric pairs of M. Reid's list of 95 families of Gorenstein K3 surfaces in weighted projective 3-spaces are strongly coupled. This includes Arnold's strange duality where the corresponding weight systems are strongly dual in Kobayashi's original sense. We show that the same is true for the extension of Arnold's strange duality found by the author and C. T. C. Wall.

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