The search session has expired. Please query the service again.
The search session has expired. Please query the service again.
The search session has expired. Please query the service again.
The search session has expired. Please query the service again.
The search session has expired. Please query the service again.
The search session has expired. Please query the service again.
The search session has expired. Please query the service again.
The search session has expired. Please query the service again.
Displaying 201 –
220 of
2608
We prove some versions of abstract Korovkin-type theorems in modular function spaces, with respect to filter convergence for linear positive operators, by considering several kinds of test functions. We give some results with respect to an axiomatic convergence, including almost convergence. An extension to non positive operators is also studied. Finally, we give some examples and applications to moment and bivariate Kantorovich-type operators, showing that our results are proper extensions of the...
This is mainly a review paper, concerned with some applications of the concept of Nonlinear Approximation to adaptive convex minimization. At first, we recall the basic ideas and we compare linear to nonlinear approximation for three relevant families of bases used in practice: Fourier bases, finite element bases, wavelet bases. Next, we show how nonlinear approximation can be used to design rigorously justified and optimally efficient adaptive methods to solve abstract minimization problems in...
Étant donnés un compact du plan complexe, et une mesure non nulle sur , on étudie , l’adhérence dans , pour la topologie , de l’algèbre des fractions rationnelles d’une variable complexe, à pôles hors de . Le résultat principal obtenu est qu’il existe un sous-ensemble de , éventuellement vide, mesurable pour la mesure de Lebesgue plane, et une mesure , éventuellement nulle, absolument continue par rapport à la mesure , tels que : soit isométriquement isomorphe à , où désigne la...
Currently displaying 201 –
220 of
2608