Cubic Surfaces and Borcherds Products

Daniel Allcock; Eberhard Freitag

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Cubic Surfaces and Borcherds Products

Daniel Allcock·Eberhard Freitag

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Abstract

The moduli space of cubic surfaces in complex projective space is known to be isomorphic to the quotient of the complex 4-ball by a certain arithmetic group. We apply Borcherds' techniques to construct automorphic forms for this group and show that these provide an embedding of the moduli space in 9-dimensional projective space. We also show that our automorphic forms directly encode the geometry of cubic surfaces, by showing that each of Cayley's invariants (certain cross-ratios) is simply a quotient of two of our automorphic forms.

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BibTeX RIS

Daniel Allcock, Eberhard Freitag. 2000-02-09. Cubic Surfaces and Borcherds Products. https://arxiv.org/abs/math/0002066

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