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1990 | OriginalPaper | Buchkapitel

The modular group and modular functions

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In the foregoing chapter we encountered unimodular transformations $$ {{c\tau + d}} $$ where a, b, c, d are integers with ad — bc = 1. This chapter studies such transformations in greater detail and also studies functions which, Iike J(τ), are invariant under unimodular transformations. We begin with some remarks concerning the more general transformations 1$$ {{cz + d}} $$ where a, b, c, d are arbitrary complex numbers.

Metadaten
Titel
The modular group and modular functions
Copyright-Jahr
1990
DOI
https://doi.org/10.1007/978-1-4612-0999-7_2

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