Tangent star cones.
Technique de descente et théorèmes d'existence en géométrie algébriques. II. Le théorème d'existence en théorie formelle des modules
The homotopy axiom in semialgebraic cohomology.
The set of points at which a morphism of affine schemes is not finite
Assume that X,Y are integral noetherian affine schemes. Let f:X → Y be a dominant, generically finite morphism of finite type. We show that the set of points at which the morphism f is not finite is either empty or a hypersurface. An example is given to show that this is no longer true in the non-noetherian case.
The spectrum associated to a radical operation.
The Spectrum of Equivariant K-theory.
The topological nature of algebraic contractions
The Witt Group of a Smooth Complex Surface.
Towards a theory of arithmetic degrees.