Active research interests

  • constructions of supercuspidal representations and types
  • enhancements of the classical local Langlands correspondence
  • the Plancherel measure and the local factors that are conjectured to express it

Papers

Seminars co-organized

Affine Hecke algebras • Winter 2024–2025

Research seminar for "The Arithmetic of the Langlands Program" • Summer 2023

The Local Langlands Conjecture for Non-Quasi-Split Groups • Summer 2023

Bruhat-Tits Theory • Winter 2022–2023

Deligne-Lusztig Theory • Lent 2022

Teaching

Algebra II: Local Fields • Winter 2023–2024

Talks

Non-basic rigid packets for discrete L-parameters
  Tokyo • Workshop on Shimura varieties, representation theory and related topics • October 2024

Tame supercuspidals at very small primes
  Singapore • September 2024

Tame supercuspidals at bad primes
  Paris • IMJ-PRG Reductive Groups and Automorphic Forms Seminar • May 2024

Tame supercuspidals at bad primes
  Poitiers • May 2024

Tame supercuspidals at bad primes
  CUNY • Graduate Center Arithmetic Geometry Seminar • May 2024

Tame supercuspidals at bad primes
  Maryland • Number Theory and Representation Theory seminar • May 2024

Tame supercuspidals at bad primes
  Boston College • Number Theory/Representation Theory Seminar • April 2024

Tame supercuspidals at bad primes
  Bonn • Arithmetic Geometry and Representation Theory Seminar • December 2023

New supercuspidals at bad primes
  West Lexham • QuINGs • August 2023

Rigid inner forms and the Bernstein decomposition for L-parameters
  Nisyros • Anaparastaseis • July 2023

Classification of reductive groups
  Bonn • Bruhat–Tits Learning Seminar • January 2023

The special fiber of a parahoric subgroup
  Bonn • Bruhat–Tits Learning Seminar • November 2022

The Principal Block
  Bonn • Arithmetische Geometrie Oberseminar • October 2022

Local Factors and the Plancherel Measure
  Bonn • Community-Building in the Langlands Program • August 2022

Reductive groups II: Borel-Weil-Bott, linkage, translation
  Oberwolfach • Arbeitsgemeinschaft "Geometric representation theory" • April 2022

Recent progress on the formal degree conjecture
  Luminy • Periods, functoriality, and L-functions • January 2022

Recent progress on the formal degree conjecture
  Cambridge • Number Theory Seminar • October 2021

Recent progress on the formal degree conjecture
  Arizona • Number Theory Seminar • August 2021

Orthogonal root numbers and the refined formal degree conjecture
  Oberwolfach • Automorphic Forms, Geometry, and Arithmetic • August 2021

Langlands, Weil, and local class field theory
  Rutgers • Graduate Number Theory Seminar • August 2021

C*-algebras and Kirillov's coadjoint orbit method
  Harish-Chandra Seminar • March 2021

Background on the Gan-Gross-Prasad conjectures
  Automorphic Seminar • March 2021

Conference travel

Workshop on Shimura varieties, representation theory and related topics • Tokyo • October 2024

Bushnell memorial conference • London • September 2024

Guy Henniart birthday conference • Amiens • September 2023

QuINGs • West Lexham • August 2023

Anaparastaseis: Orbits, Hecke algebras, and representations • Nisyros • July 2023

Peter Schneider birthday conference • Münster • February 2023

Workshop on the Bezrukavnikov equivalence • Essen, Münster, Bonn • November 2022, December 2022, January 2023

Community-Building in the Langlands Program • Bonn • August 2022

Summer School on the Langlands Program • IHES • July 2022

Arbeitsgemeinschaft: Geometric Representation Theory • Oberwolfach • April 2022

Midwest Representation Theory Conference • Ann Arbor • March 2022

Periods, functoriality, and L-functions • Luminy • January 2022

Automorphic Forms, Geometry and Arithmetic (online) • Oberwolfach • August 2021

Past affiliations

Cambridge • Research Fellow • 2021–2022

Michigan • Graduate student • 2016–2021

Brown • College student • 2012–2016

About me

My last name is pronounced "shween". It rhymes with "clean", unlike the German pronunciation. In one-on-one interactions (e.g. email, conversations) you are welcome to just call me "David".