Existence of an indecomposable positive quadratic form in a given genus of rank at least 14
Expressing a number as the sum of two coprime squares.
We use hyperbolic geometry to study the limiting behavior of the average number of ways of expressing a number as the sum of two coprime squares. An alternative viewpoint using analytic number theory is also given.
Extension du théorème de Fermat sur les nombres polygones
Extensions algébriques et formes quadratiques
Extensions of classical congruences for parameters in binary quadratic forms
Extrait d'une lettre
Extrait d'une Lettre adressée à M. Besge.
Extrait d'une lettre de M. Ch. Hermite à M. Borchardt sur la réduction des formes quadratiques ternaires.
Extreme binary forms