Circle-valued Morse theory and Reidemeister torsion.
Classification des germes à point critique isolé et à nombres de modules 0 ou 1
Closed Geodesics on Homogeneous Spaces.
Continuous mappings with an infinite number of topologically critical points
We prove that the topological φ-category of a pair (M,N) of topological manifolds is infinite if the algebraic φ-category of the pair of fundamental groups (π₁(M),π₁(N)) is infinite. Some immediate consequences of this fact are also pointed out.
Controlled connectivity of closed 1-forms.
Convex functions on complete noncompact manifolds : differentiable structure
Coordinate morse theory.
Critical point theory with symmetries.
Critical sets in 3-space
Critical sets of 2-dimensional compact manifolds.