Some new conformal covariants.
Some priori estimates about solutions to nonhomogeneous -harmonic equations.
Some Properties of a Cohomology Group Associated to a Totally Geodesic Foliation.
Some properties of semibase Pfaffian forms on the tangent bundle
Some remark on the stability problems for de Rham currents.
Some Remarks on Analytic Foliations and Analytic Branched Coverings.
Some remarks on Lie flows.
The first part of this paper is concerned with geometrical and cohomological properties of Lie flows on compact manifolds. Relations between these properties and the Euler class of the flow are given.The second part deals with 3-codimensional Lie flows. Using the classification of 3-dimensional Lie algebras we give cohomological obstructions for a compact manifold admits a Lie flow transversely modeled on a given Lie algebra.
Some remarks on the automorphism group of a compact group action
Some remarks on vector analysis.
Some results about Mastrogiacomo cohomology.
Some results on the calculus of variations on jet spaces
Some results on the frame bundle of an almost contact metric manifold
Some Surfaces that are Distinguishable by the Global Expression of Their Volume Elements.
Split octonions and generic rank two distributions in dimension five
In his famous five variables paper Elie Cartan showed that one can canonically associate to a generic rank 2 distribution on a 5 dimensional manifold a Cartan geometry modeled on the homogeneous space , where is one of the maximal parabolic subgroups of the exceptional Lie group . In this article, we use the algebra of split octonions to give an explicit global description of the distribution corresponding to the homogeneous model.
Splitting theorems for the double tangent bundles of Fréchet manifolds.
Stability of certain Engel-like distributions
We introduce a higher dimensional analogue of the Engel structure, motivated by the Cartan prolongation of contact manifolds. We study the stability of such structure, generalizing the Gray-type stability results for Engel manifolds. We also derive local normal forms defining such a distribution.
Stability of Tangential Locally Conformal Symplectic Forms
In this paper we firstly define a tangential Lichnerowicz cohomology on foliated manifolds. Next, we define tangential locally conformal symplectic forms on a foliated manifold and we formulate and prove some results concerning their stability.
Sternberg's structure function of differential systems in dimension five
Stochastic calculus, statistical asymptotics, Taylor strings and phyla
Stokes' formula for singular chains in a differential space of finite dimension