English

Fractal behavior of tensor powers of tilting modules of $\text{SL}_2$

Representation Theory 2026-01-01 v1

Abstract

Given a group GG and VV a representation of GG, denote the number of indecomposable summands of VkV^{\otimes k} by bkG,Vb_k^{G, V}. Given a tilting representation TT of SL2(K)\text{SL}_2(K) where K=KK=\overline{K} and of characteristic p>2p>2, we show that Ckαp(dimT)k<bkT,SL2(K)<Dkαp(dimT)kCk^{-\alpha_p}(\text{dim} T)^k<b_k^{T, \text{SL}_2(K)}<Dk^{-\alpha_p}(\text{dim} T)^k for some C,D>0C, D>0 where αp=1(1/2)logp(p+12).\alpha_p=1-(1/2)\log_p(\frac{p+1}{2}).

Keywords

Cite

@article{arxiv.2512.24317,
  title  = {Fractal behavior of tensor powers of tilting modules of $\text{SL}_2$},
  author = {Nai-Heng Sheu},
  journal= {arXiv preprint arXiv:2512.24317},
  year   = {2026}
}