Remainders of power series.
McCall, J.D., Fricke, G.H., Beyer, W.A. (1979)
International Journal of Mathematics and Mathematical Sciences
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McCall, J.D., Fricke, G.H., Beyer, W.A. (1979)
International Journal of Mathematics and Mathematical Sciences
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Marcin Borkowski, Piotr Maćkowiak (2012)
Commentationes Mathematicae Universitatis Carolinae
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In this paper, we present a considerable simplification of the proof of a theorem by Gan and Knox, stating a sufficient and necessary condition for existence of a composition of two formal power series. Then, we consider the behavior of such series and their (formal) derivatives at the boundary of the convergence circle, obtaining in particular a theorem of Bugajewski and Gan concerning the structure of the set of points where a formal power series is convergent with all its derivatives. ...
Patricio Felmer, Alexander Quaas, Moxun Tang (2009)
Annales de l'I.H.P. Analyse non linéaire
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Perera, Kanishka, Zhang, Zhitao (2005)
Boundary Value Problems [electronic only]
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Yiğider, Muhammed, Tabatabaei, Khatereh, Çelik, Ercan (2011)
Discrete Dynamics in Nature and Society
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Marc Schweitzer (2012)
Open Mathematics
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This paper is concerned with the generalization of the finite element method via the use of non-polynomial enrichment functions. Several methods employ this general approach, e.g. the extended finite element method and the generalized finite element method. We review these approaches and interpret them in the more general framework of the partition of unity method. Here we focus on fundamental construction principles, approximation properties and stability of the respective numerical...
W. Leksiński, W. Żakowski (1975)
Annales Polonici Mathematici
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Jérôme Droniou, Robert Eymard, Thierry Gallouët, Raphaèle Herbin (2020)
Czechoslovak Mathematical Journal
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We design an abstract setting for the approximation in Banach spaces of operators acting in duality. A typical example are the gradient and divergence operators in Lebesgue-Sobolev spaces on a bounded domain. We apply this abstract setting to the numerical approximation of Leray-Lions type problems, which include in particular linear diffusion. The main interest of the abstract setting is to provide a unified convergence analysis that simultaneously covers (i) all usual boundary conditions,...