Alcune applicazioni della Teoria di Morse a problemi di tipo ellittico
Alcune osservazioni sulle onde magnetoacustiche
Nel presente lavoro si fanno alcune osservazioni sulle onde magnetoacustiche. Esse, per quanto è a conoscenza dell'autore, non sono presenti nella vastissima letteratura sull'argomento; nonostante la loro semplicità, è sembrato di un qualche interesse segnalarle esplicitamente per il loro contenuto fisico. Specificatamente riguardano: l'effetto Doppler; la quantità di moto; il carattere di onde di condensazione; il carattere conservativo del campo di forza magnetica; l'equipartizione dell'energia....
Alcuni risultati di teoria spettrale per l'operatore di Laplace in regioni non limitate con frontiera non regolare
Aleksandrov-type estimates for a parabolic Monge-Ampère equation.
Algebraic and analytic properties of solutions of abstract differential equations [Book]
Algebraic Fermi curves
Algebraic lower bounds for the uniform radius of spatial analyticity for the generalized KdV equation
Algebraic methods in the theory of global properties of the oscillatory equations
Algebraic Multi Level Preconditioning Methods. I.
Algebraic study of systems of partial differential equations
Algebraic study of systems of partial differential equations
Algebraic sum of unbounded normal operators and the square root problem of Kato
Algebras of differentiable functions in the plane
Soit un ensemble quelconque d’opérateurs différentiels en deux variables à coefficients complexes constants. Soit l’espace des fonctions continues complexes tendant vers zéro à l’infini dans le plan euclidien. Soit l’espace , tout . Classifier ces espaces équivaut à trouver des conditions nécessaires et suffisantes sur des opérateurs différentiels pour que . Il paraît que ce problème général est bien difficile. Nous présentons ici la solution complète dans le cas spécial des stables...
Algèbres différentielles et problème de Goursat non linéaire à données irrégulières
Algèbres et équations non-linéaires
Algebro-geometric approach to the Ernst equation I. Mathematical Preliminaries
1. Introduction. It is well known that methods of algebraic geometry and, in particular, Riemann surface techniques are well suited for the solution of nonlinear integrable equations. For instance, for nonlinear evolution equations, so called 'finite gap' solutions have been found by the help of these methods. In 1989 Korotkin [9] succeeded in applying these techniques to the Ernst equation, which is equivalent to Einstein's vacuum equation for axisymmetric stationary fields. But, the Ernst equation...
Algebro-geometric solutions of the Camassa-Holm hierarchy.
We provide a detailed treatment of the Camassa-Holm (CH) hierarchy with special emphasis on its algebro-geometric solutions. In analogy to other completely integrable hierarchies of soliton equations such as the KdV or AKNS hierarchies, the CH hierarchy is recursively constructed by means of a basic polynomial formalism invoking a spectral parameter. Moreover, we study Dubrovin-type equations for auxiliary divisors and associated trace formulas, consider the corresponding algebro-geometric initial...
Algorithm for construction of explicit -order Runge-Kutta formulas for the systems of differential equations of the 1st order
Algorithm for reconstruction of the elastic constants of an anisotropic layer lying in an isotropic horizontally stratified medium.
Algorithmic construction of hyperfunction solutions to invariant differential equations on the space of real symmetric matrices.