An introduction to spherical orbit spaces.
An introduction to symplectic topology
An introduction to the completeness of compact semi-riemannian manifolds
An introduction to the Einstein-Vlasov system
An invariant of nonpositively curved contact manifolds
We define an invariant of contact structures and foliations (on Riemannian manifolds of nonpositive sectional curvature) which is upper semi-continuous with respect to deformations and thus gives an obstruction to the topology of foliations which can be approximated by isotopies of a given contact structure.
An isoembolic pinching theorem.
An isoperimetric comparison theorem.
An -isolation theorem for Yang-Mills fields
An -isolation theorem for Yang-Mills fields over complete manifolds
An Obstruction to the Existence of Affine Structures.
An Obstruction to the Existence of Einstein Kähler Metrics.
An ODE approach to the equation ... U + Ku ... = 0, in Rn.
An optimal estimate of the free boundary of a minima surface.
An Osserman-type condition on g.f.f-manifolds with Lorentz metric
A condition of Osserman type, called the φ-null Osserman condition, is introduced and studied in the context of Lorentz globally framed f-manifolds. An explicit example shows the naturality of this condition in the setting of Lorentz 𝓢-manifolds. We prove that a Lorentz 𝓢-manifold with constant φ-sectional curvature is φ-null Osserman, extending a well-known result in the case of Lorentz Sasaki space forms. Then we state a characterization of a particular class of φ-null Osserman 𝓢-manifolds....
An Overview of the Proof of the Splitting Theorem in Spaces with Non-Negative Ricci Curvature
An unknotting result for complete minimal surfaces R3.
An upper bound for the first eigenvalue of the Dirac operator on compact spin manifolds.
An -regularity result for generalized harmonic maps into spheres.
Analyse précisée d'équations semi-linéaires elliptiques sur l'espace hyperbolique et application à la courbure scalaire conforme
Analysis in complex quaternions and its connections with mathematical physics