On the rational symplectic group

Yves Benoist (1, 2)

1 CNRS - Centre National de la Recherche Scientifique
2 Université Paris-Saclay

This note contains a short proof of a classical result: any rational symplectic matrix can be put in diagonal form after right and left multiplication by integral symplectic matrices.

Domaines: Théorie des groupes [math.GR]

Yves Benoist. On the rational symplectic group. 2023. ⟨hal-03744454v5⟩