Normal origamis of Mumford curves

Details Normal origamis of Mumford curves Normal origamis of Mumford curves

2010-07-05

arxiv.org/abs/1007.0666v1

Mathematics

Algebraic Geometry

21 pages, to appear in manuscripta mathematica (Springer)

Scientific paper

10.1007/s00229-010-0379-8

An origami (also known as square-tiled surface) is a Riemann surface covering a torus with at most one branch point. Lifting two generators of the fundamental group of the punctured torus decomposes the surface into finitely many unit squares. By varying the complex structure of the torus one obtains easily accessible examples of Teichm\"uller curves in the moduli space of Riemann surfaces. The p-adic analogues of Riemann surfaces are Mumford curves. A p-adic origami is defined as a covering of Mumford curves with at most one branch point, where the bottom curve has genus one. A classification of all normal non-trivial p-adic origamis is presented and used to calculate some invariants. These can be used to describe p-adic origamis in terms of glueing squares.

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