Lorentz-invariant quantum fields in the space-time tangent bundle.
L'oscillateur relativiste et les fonctions de Mathieu
Losik cohomology of the Lie algebra of infinitesimal automorphisms of a -structure
Losik cohomology of the Lie algebra of infinitesimal automorphisms of a -structure. II
Lösung einer Funktionalgleichung für Translationsflächen die ein zylindrisch-konisches Netz besitzen
Lower Bounds for Eigenfunctions on Riemannian Manifolds.
Lower Bounds for the Eigenvalues of Negatively Curved Manifolds.
Lower bounds for the eigenvalues of the basic Dirac operator
Lower curvature bounds, Toponogov's theorem, and bounded topology
Lower curvature bounds, Toponogov's theorem, and bounded topology. II
Lp pinching and compactness theorems for compact Riemannian manifolds.
Lp-pinching and the geometry of compact Riemannian manifolds.
Magnetic Curves in a Euclidean Space: One Example, Several Approaches
Magnetic fields generated by piecewise rectilinear configurations.
Magnetic flows and Gaussian thermostats on manifolds of negative curvature
We consider a class of flows which includes both magnetic flows and Gaussian thermostats of external fields. We give sufficient conditions for such flows on manifolds of negative sectional curvature to be Anosov.
Mainfolds with small excess and bounded curvature.
Manifolds admitting stable forms
In this note we give a direct method to classify all stable forms on as well as to determine their automorphism groups. We show that in dimensions 6, 7, 8 stable forms coincide with non-degenerate forms. We present necessary conditions and sufficient conditions for a manifold to admit a stable form. We also discuss rich properties of the geometry of such manifolds.
Manifolds carrying bounded quasiharmonic but no bounded harmonic functions.
Manifolds of almost nonnegative curvature
Manifolds of Dimension 3 with Prescribed Positive Curvature and with Nontrivial Homology.