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Some totally non-congruence subgroups of PSL(2,Z) and their modular embeddings

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Speaker: 
Martin Möller
Zugehörigkeit: 
U Frankfurt
Datum: 
Die, 2013-03-12 14:00 - 15:00
Location: 
MPIM Lecture Hall

Veech groups of square-tiled surfaces are a natural source
of non-congruence subgroups of PSL(2,Z). Following work of G.Weitze-Schmitthüsen and C.Weiss we show that they are 'totally non-congruence'.
However, due to their geometric origin Veech groups come with a modular embedding and we discuss consequences for modular forms for these groups.

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