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The Highly Oscillatory Behavior of Automorphic Distributions for SL(2)

Stephen D. Miller·Wilfried Schmid
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Abstract

Automorphic distributions for SL(2) arise as boundary values of modular forms and, in a more subtle manner, from Maass forms. In the case of modular forms of weight one or of Maass forms, the automorphic distributions have continuous first antiderivatives. We recall earlier results of one of us on the Holder continuity of these continuous functions and relate them to results of other authors; this involves a generalization of classical theorems on Fourier series by S. Bernstein and Hardy-Littlewood. We then show that the antiderivatives are non-differentiable at all irrational points, as well as all, or in certain cases, some rational points. We include graphs of several of these functions, which clearly display a high degree of oscillation. Our investigations are motivated in part by properties of "Riemann's nondifferentiable function", also known as "Weierstrass' function".

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BibTeXRIS

Stephen D. Miller, Wilfried Schmid. 2004-10-31. The Highly Oscillatory Behavior of Automorphic Distributions for SL(2). https://doi.org/10.1007/s11005-004-0470-8

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