Second order differential invariants of linear frames.
Separation of variables in the problems of normal and compact solvability of the exterior derivation operator.
Simplicial types and polynomial algebras
This paper shows that the simplicial type of a finite simplicial complex is determined by its algebra of polynomial functions on the baricentric coordinates with coefficients in any integral domain. The link between and is done through certain admissible matrix associated to in a natural way. This result was obtained for the real numbers by I. V. Savel’ev [5], using methods of real algebraic geometry. D. Kan and E. Miller had shown in [2] that determines the homotopy type of the polyhedron...
Singular foliations and differential -forms
Singularities of k-tuples of vector fields [Book]
Ski de fond
Some algebraic theorems on vector-valued forms and their geometric applications
Some estimates of integrals with a composition operator.
Some geometric aspects of the calculus of variations in several independent variables
This paper describes some recent research on parametric problems in the calculus of variations. It explains the relationship between these problems and the type of problem more usual in physics, where there is a given space of independent variables, and it gives an interpretation of the first variation formula in this context in terms of cohomology.
Some priori estimates about solutions to nonhomogeneous -harmonic equations.
Some properties of semibase Pfaffian forms on the tangent bundle
Some remarks on the automorphism group of a compact group action
Some remarks on vector analysis.
Some Surfaces that are Distinguishable by the Global Expression of Their Volume Elements.
Stokes' formula for singular chains in a differential space of finite dimension
Submersions sur le cercle
Sui teoremi di De Rham
Sulla coomologia intera delle varietà differenziabili
Superconnection currents and complex immersions.
Sur la trace et le théorème de Stokes dans la théorie des distributions