A Characterization of the Sphere and Euclidean Space by Transformation Groups.
A family of flat Minkowski planes admitting 3-dimensional simple groups of automorphisms.
A note on Lie algebroids which arise from groupoid actions
A note on my paper "Notes on compact semigroups with identity".
A note on the location of joint discontinuity.
Actions of some infinite Lie groups.
Adhérence d'orbite et invariants.
An algebraic group associated to an ergodic diffeomorphism
Chain Complexes and Assembly.
Classification of singularities with compact abelian symmetry
Dénombrement des types de K-homotopie. Théorie de la déformation
Distal affine transformation groups.
Dynamische Systeme und topologische Aktionen.
Equivariant Nielsen theory
Finite actions on the Klein four-orbifold and prism manifolds
We describe the finite group actions, up to equivalence, which can act on the orbifold , and their quotient types. This is then used to consider actions on prism manifolds which preserve a longitudinal fibering, but do not leave any Heegaard Klein bottle invariant. If is such an action, we show that and fibers over a certain collection of 2-orbifolds with positive Euler characteristic which are covered by . For the standard actions, we compute the fundamental group of and indicate when...
Fixed point indices of equivariant maps and Möbius inversions.
Fixed point theory for homogeneous spaces, II
Let G be a compact connected Lie group, K a closed subgroup and M = G/K the homogeneous space of right cosets. Suppose that M is orientable. We show that for any selfmap f: M → M, L(f) = 0 ⇒ N(f) = 0 and L(f) ≠ 0 ⇒ N(f) = R(f) where L(f), N(f), and R(f) denote the Lefschetz, Nielsen, and Reidemeister numbers of f, respectively. In particular, this implies that the Lefschetz number is a complete invariant, i.e., L(f) = 0 iff f is deformable to be fixed point free. This was previously known under...
Fixed sets and free subgroups of groups acting on metric spaces.
Flag Structures on Seifert Manifolds.
Function spaces and adjoints.