Abstract
We study the simultaneous sign change of Fourier coefficients of a pair of distinct normalized newforms of integral weight supported on primes power indices, we also prove some equidistribution results. Finally, we consider an analogous question for Fourier coefficients of a pair of half-integral weight Hecke eigenforms.
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Amri, M.A. Simultaneous sign change and equidistribution of signs of Fourier coefficients of two cusp forms. Arch. Math. 111, 257–266 (2018). https://doi.org/10.1007/s00013-018-1203-z
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DOI: https://doi.org/10.1007/s00013-018-1203-z