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Symplectic phase flow approximation for the numerical integration of canonical systems
New methods are presented for the numerical integration of ordinary differential equations of the important family of Hamiltonian dynamical systems....
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Local properties of geodesics onp-convex sets
We prove some local properties of geodesics on p-convex sets. First of all, we give an intrinsic characterization of geodesic in terms of local...
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P-convessità e convergenza di geodetiche
We consider a sequence of energy functionals for regular paths with fixed extremes and whose range is contained in a corresponding sequence (M ...
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Some properties of associated pseudoconnections
Pseudoconnections (or quasi connections) were defined as a generalization of linear connections by Y.-C. Wong in [14], and were developed mainly by...
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Groups of transformations of Riemannian manifolds
This paper is a survey of the articles reviewed by the journal Matematika from January 1971 through August 1989 on groups of transformations of...
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Homotopical properties of a class of nonsmooth functions
A class of extended real valued functionals, already considered for evolution problems, is studied. The set where the functional is finite is proved...
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The Calculus of Variations and Some Semilinear Variational Inequalities of Elliptic and Parabolic Type
We present here a survey on some techniques of nonsmooth calculus of variations, that we developed in these last years in collaboration with other...
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Multiplicity of solutions for elliptic inequalities in presence of symmetries
In this paper we get a multiplicity result for the solutions of a variational inequality of elliptic type, in presence of symmetries.
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Esistenza e molteplicità per gli autovalori non lineari dell’operatore −Δ−g rispetto a due ostacoli
We consider the existence and the multiplicity of the eigenfunctions and of the related non linear eigenvalues for the operator −Δ− g on a bounded...
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Connections on differentiable fiber bundles
We present a theory of external connections on differentiable fiber bundles and on the basis of this theory we give a survey of papers on the theory...
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Quantization as geometry in phase space
The geometrical interpretation of quantum mechanics in relativistic phase space proposed by this writer leads, under the sole assumption of a...
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Nuovi risultati sulla convergenza dei funzionali
The Γ-convergence theory has had many applications in the study of minima of functionals in calculus of variations. Recently some results have been...
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Alcune osservazioni riguardanti i gruppi di LieG 2 e Spin(7), candidati a gruppi di olonomia
The Lie groups G 2 and Spin(7) can be considered as automorphisms groups of euclidean vector spaces (of dimension 7, 8 resp.) endowed with a suitable...