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arXiv · 1707.00634

Comparing Hecke eigenvalues of newforms

Liubomir Chiriac
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Abstract

Given two distinct newforms with real Fourier coefficients, we show that the set of primes where the Hecke eigenvalues of one of them dominate the Hecke eigenvalues of the other has density at least 1/16. Furthermore, if the two newforms do not have complex multiplication, and neither is a quadratic twist of the other, we also prove a similar result for the squares of their Hecke eigenvalues.

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Liubomir Chiriac. 2017-07-03. Comparing Hecke eigenvalues of newforms. https://doi.org/10.1007/s00013-017-1072-x

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