Integral bases and invariant vectors for Weil representations

Shaul Zemel*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


We construct, for the Weil representation associated with any discriminant form, an explicit basis in which the action of the representation involves algebraic integers over its field of definition. The action of a general element of SL 2(Z) on many parts of these bases is simple and explicit, a fact that we use for determining the dimension of the space of invariants for some families of discriminant forms.

Original languageAmerican English
Article number5
JournalResearch in Number Theory
Issue number1
StatePublished - Mar 2023

Bibliographical note

Publisher Copyright:
© 2022, The Author(s), under exclusive licence to Springer Nature Switzerland AG.


  • Invariant Subspaces
  • Representations over Rings
  • Weil Representations


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