Formes quadratiques et algèbres quadratiques
Formes quadratiques et formes non traciques sur les espaces de dimension dénombrable
Formes quadratiques multiplicatives et variétés algébriques
Formes quadratiques réelles semi-définies. Démonstration élémentaire du critère des mineurs principaux.
Formes quadratiques sur un semi-groupe involutif.
Fröhlich's local quadratic forms.
Further results on the Craig-Sakamoto equation.
G-invariant quadratic forms.
Graded monoidal categories
Groupes de Witt d'un corps de caractéristique 2.
Hankel forms
It is an open question whether Nehari's theorem on the circle group has an analogue on the infinite-dimensional torus. In this note it is shown that if the analogue holds, then some interesting inequalities follow for certain trigonometric polynomials on the torus. We think these inequalities are false but are not able to prove that.
Hankel forms and sums of random variables
A well known theorem of Nehari asserts on the circle group that bilinear forms in H² can be lifted to linear functionals on H¹. We show that this result can be extended to Hankel forms in infinitely many variables of a certain type. As a corollary we find a new proof that all the norms on the class of Steinhaus series are equivalent.
Hasse principle for Hopf maps.
Hasse principle for the Hurwitz problem.
Hermitesche und orthogonale Operatoren über kommutativen Ringen.
Hintereinanderausführung von Formen.
Hyponormal matrices and semidefinite invariant subspaces in indefinite inner products.
Incidence coalgebras of intervally finite posets, their integral quadratic forms and comodule categories
Indecomposable Quadratic Bundles of rank 4n over the Real Affine Plane.
Indecomposable Rank 4 Quadratic Spaces of Non-Trivial Discriminant Over Polynomial Rings.