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New York Journal of Mathematics
Volume 32 (2026), 974-1009

  

Arpan Das

A restriction problem for mod-p representations of SL2(F)

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Published: June 9, 2026.
Keywords: Restriction, Mod-p representations, Hecke eigenvalues.
Subject [2020]: Primary 22E50; Secondary 11F70.

Abstract
Let p be a prime and F a non-archimedean local field of residue characteristic p. In this paper, we study the restriction of smooth irreducible Fp-representations of SL2(F) to its Borel subgroup. In essence, we show that the action of SL2(F) on its irreducibles is controlled by the action of the Borel subgroup. The results of this paper constitute the SL2-analogue of a work of Paskunas [18].

Acknowledgements

The author is supported by Ph.D. scholarship from Harish-Chandra Research Institute, A CI of Homi Bhabha National Institute. The author would also like to thank INFOSYS for providing partial financial support.


Author information

Arpan Das
Harish-Chandra Research Institute
Chhatnag Road
Jhusi, Prayagraj - 211019, India, and
Homi Bhaba National Institute
Training School Complex
Anushaktinagar, Mumbai - 400094, India

arpan3141@gmail.com