On the Lusternik-Schnirelmann Category of Lie Groups.
On the Number of Relations in The Cohomology of A Fixed Point Set.
Pseudomorphisms of automata
Revêtements «spinoriels» du groupe symplectique et indices de Maslov
Some examples of vector fields on the 3-sphere
Let denote the set of points with modulus one in euclidean 4-space ; and let denote the space of nonsingular vector fields on with the topology. Under what conditions are two elements from homotopic ? There are several examples of nonsingular vector fields on . However, they are all homotopic to the tangent fields of the fibrations of due to H. Hopf (there are two such classes).We construct some new examples of vector fields which can be classified geometrically. Each of these examples...
Spaces and equations
It is proved, for various spaces A, such as a surface of genus 2, a figure-eight, or a sphere of dimension ≠ 1,3,7, and for any set Σ of equations, that Σ cannot be modeled by continuous operations on A unless Σ is undemanding (a form of triviality that is defined in the paper).
Stable real cohomology of arithmetic groups
The connective K-theory of spinor groups.
We study the properties of the connective K-theory with Z2 coefficients of the Lie groups Spin(n). This generalises some work by L. Hodgkin.
The cyclic homology of
The Structure of Morava Stabilizer Algebras.
The topology of spaces of coprime polynomials.
Théorie de Schreier supérieure
Zerspaltung äquivarianter Homotopiemengen.