Document Type

Article

Publication Date

1-1-2012

Abstract

Given a finite index subgroup of SL2(ℤ) with modular curve defined over ℚ, under the assumption that the space of weight k (≥2) cuspforms is one-dimensional, we show that a form in this space with Fourier coefficients in ℚ has bounded denominators if and only if it is a congruence modular form. © 2012 London Mathematical Society.

Publication Source (Journal or Book title)

Bulletin of the London Mathematical Society

First Page

591

Last Page

598

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