About Me

I am a Research Associate at the University of Sheffield working in the group of Robert Kurinczuk. Previously, I was a PhD student at Imperial College London and the London School of Geometry and Number Theory supervised by David Helm.

You can contact me at j.girsch [at] sheffield.ac.uk 

Publications and Preprints

• On families of degenerate representations of GL_n(F), with D. Helm

Preprint, (arXiv, Oberwolfach report)

• Newforms in Cuspidal Representations, with R. Kurinczuk

Preprint, submitted, (arXiv)

• The Twisted Doubling Method in Algebraic Families 

Preprint, submitted, (arXiv)

• On tori periods of Weil Representations of unitary groups, with N. Borade, J. Franzel, W. Yao, Q. Yu, E. Zelingher 

accepted for publication in Selecta Mathematica, (arXiv)

• The Doubling Method in Algebraic Families

International Mathematics Research Notices, Volume 2023, Issue 14, July 2023, 12561–12600.  (arXiv, journal)

• Class invariants for certain non-holomorphic modular functions, with J. Braun and J. Buck

Research in Number Theory 1, 21 (2015).   (arXiv, journal)