English

A note on the dimension of the largest simple Hecke submodule

Number Theory 2018-12-19 v3

Abstract

For k2k\ge 2 even, let dk,Nd_{k,N} denote the dimension of the largest simple Hecke submodule of Sk(Γ0(N);Q)newS_{k}(\Gamma_0(N); \mathbb{Q})^\text{new}. We show, using a simple analytic method, that dk,NkloglogN/log(2p)d_{k,N} \gg_k \log\log N / \log(2p) with pp the smallest prime co-prime to NN. Previously, bounds of this quality were only known for NN in certain subsets of the primes. We also establish similar (and sometimes stronger) results concerning Sk(Γ0(N),χ)S_{k}(\Gamma_0(N), \chi), with k2k \geq 2 an integer and χ\chi an arbitrary nebentypus.

Keywords

Cite

@article{arxiv.1810.02006,
  title  = {A note on the dimension of the largest simple Hecke submodule},
  author = {Sandro Bettin and Corentin Perret-Gentil and Maksym Radziwiłł},
  journal= {arXiv preprint arXiv:1810.02006},
  year   = {2018}
}

Comments

11 pages

R2 v1 2026-06-23T04:27:57.197Z