Pairs of Pell equations having at most one common solution in positive integers.
Parametrizing SL₂(ℤ) and a question of Skolem
Partitions and indefinite quadratic forms.
Perfect squares in the sequence .
Polynomial parametrizations of length 4 Büchi sequences
Prime Pythagorean triangles.
Products of consecutive integers and the Markoff equation.
Propositions relatives à la théorie des nombres
Pythagoräische Tripel: Gleichverteilung und geometrische Anwendungen