Variants of Lehmer's speculation for newforms
Variants of Lehmer's speculation for newforms
复制标题
莱默对新形式的推测的变体
DOI:
10.1016/j.aim.2023.109141
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发表时间:
2023
影响因子:
1.7
通讯作者:
Tsai, Wei-Lun
中科院分区:
文献类型:
--
作者:
Balakrishnan, Jennifer S.;Craig, William;Ono, Ken;Tsai, Wei-Lun
In the spirit of Lehmer's unresolved speculation on the nonvanishing of Ramanujan's tau-function, it is natural to ask whether a fixed integer α is a value of τ (n) or is a Fourier coefficient a f (n) of any given newform f (z). We offer a method, which applies to newforms with integer coefficients and trivial residual mod 2 Galois representation, that answers this question for odd α. We determine infinitely many spaces for which the primes 3≤ ℓ≤ 37 are not absolute values of coefficients of newforms with integer coefficients, and we obtain many explicit examples for τ (n). We also obtain sharp lower bounds for the number of prime factors of such newform coefficients. In the weight aspect, for powers of odd primes ℓ, we prove that±ℓ m is not a coefficient of any such newform f with weight 2 k> M±(ℓ, m) and even level coprime to ℓ, where M±(ℓ, m) are effectively computable constants that are O ℓ (m).
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DOI:
10.1007/s11139-021-00388-w
发表时间:
2022
期刊:
The Ramanujan Journal
影响因子:
--
作者:
Amir, Malik;Hong, Letong
通讯作者:
Hong, Letong
影响因子:
0.7
作者:
Balakrishnan, Jennifer S.;Craig, William;Ono, Ken
通讯作者:
Ono, Ken
DOI:
--
发表时间:
2013
期刊:
影响因子:
--
作者:
N. Lygeros;O. Rozier
通讯作者:
O. Rozier
影响因子:
0.7
作者:
S. G. Rayaguru
通讯作者:
S. G. Rayaguru
DOI:
10.1007/s44007-021-00005-8
发表时间:
2022
期刊:
La Matematica
影响因子:
--
作者:
Balakrishnan, Jennifer S.;Ono, Ken;Tsai, Wei-Lun
通讯作者:
Tsai, Wei-Lun