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Resultats globals: 4 registres trobats en 0.03 segons.
Articles, 4 registres trobats
Articles 4 registres trobats  
1.
36 p, 677.5 KB Scale invariant regularity estimates for second order elliptic equations with lower order coefficients in optimal spaces / Sakellaris, Georgios (Universitat Autònoma de Barcelona. Departament de Matemàtiques)
We show local and global scale invariant regularity estimates for subsolutions and supersolutions to the equation −div(A∇u+bu)+c∇u+du=−divf+g, assuming that A is elliptic and bounded. In the setting of Lorentz spaces, under the assumptions b,f∈L, [Formula presented] and c∈L for q≤∞, we show that, with the surprising exception of the reverse Moser estimate, scale invariant estimates with "good" constants (that is, depending only on the norms of the coefficients) do not hold in general. [...]
2021 - 10.1016/j.matpur.2021.10.009
Journal des Mathematiques Pures et Appliquees, Vol. 156 (December 2021) , p. 179-214  
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2.
19 p, 1.1 MB From Boltzmann to Zipf through Shannon and Jaynes / Corral, Álvaro (Universitat Autònoma de Barcelona. Departament de Matemàtiques) ; García del Muro, Montserrat (Universitat de Barcelona. Institut de Nanociència i Nanotecnologia)
The word-frequency distribution provides the fundamental building blocks that generate discourse in natural language. It is well known, from empirical evidence, that the word-frequency distribution of almost any text is described by Zipf's law, at least approximately. [...]
2020 - 10.3390/e22020179
Entropy, Vol. 22, Issue 2 (February 2020) , art. 179  
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3.
39 p, 494.2 KB The Dirichlet problem for nonlocal Lévy-type operators / Rutkowski, Artur (Wroclaw University of Science and Technology (Wroclaw, Polònia). Faculty of Pure and Applied Mathematics)
We present the theory of the Dirichlet problem for nonlocal operators which are the generators of general pure-jump symmetric Lévy processes whose Lévy measures need not be absolutely continuous. We establish basic facts about the Sobolev spaces for such operators, in particular we prove the existence and uniqueness of weak solutions. [...]
2018 - 10.5565/PUBLMAT6211811
Publicacions matemàtiques, Vol. 62 Núm. 1 (2018) , p. 213-251 (Articles)  
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4.
20 p, 192.9 KB The M/G/1 retrial queue : an information theoretic approach (p. 119-137) / Artalejo, Jesús R. ; López Herrero, M. J. ; Universidad Complutense de Madrid
In this paper, we give a survey of the use of information theoretic techniques for the estimation of the main performance characteristics of the M/G/1 retrial queue. We focus on the limiting distribution of the system state, the length of a busy period and the waiting time. [...]
2005
SORT : statistics and operations research transactions, Vol. 29, Núm. 1 (2005) , p. 119-138  
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