Numerical Methods in Approximation Theory, Vol. 9, D. Braess; L.L. Schumaker

Автор: B. Aupetit
Название: Complex Approximation
ISBN: 081763004X ISBN-13(EAN): 9780817630041
Издательство: Springer
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Автор: Bautzer; Kahane; Nagy
Название: Linear Operators and Approximation / Lineare Operatoren und Approximation
ISBN: 3034872852 ISBN-13(EAN): 9783034872850
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Описание: Chapter IV contains papers on harmonic analysis in connection with approximation and, finally, Chapter V is devoted to approximation by splines, algebraic polynomials, rational functions, and to Pade approximation.

Автор: DESCLOUX; MARTI
Название: Numerical Analysis
ISBN: 3764309393 ISBN-13(EAN): 9783764309398
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Описание: Nowadays aluminium is essentially produced according to the Hall-H roult process, in other words, by electrolysis of alumina A1 0 desolved in molten cryolite Na A1F at a 2 3 3 6 temperature of about 950 C. In a reduction plant cells are connected in series. For technical and economical reasons, it is advisable to choose large nominal currents (150 kAle For such intensities, the electromagnetic effects in the cells become important. In particular, these effects bring about movements in the liauid metal, as well as interface variations in level, that are detrimental to efficiencv and energy consumption l, - For an optimal design, it is necessary to predetermine the electromagnetic behaviour of each new typ of cells. It is specially necessary to calculate the repartition of the current density in each point of the cell (electric problem), and the magnetic induction produced in the liquid metal by the currents circulating in the cell itself, in the near cells and in the external conductors (magnetic problem). Electric problem formulation Stationary electric phenomena are described by the equations . . . rotE=O (1) . . . divJ=O (2) t=f1 (3) The first equation can be replaced by t=-g;tdU (4) where U is the electric potential. J. -M. BLANC 131 -] We can eliminate E and J between the equations above. In an homogeneous material, we obtain a Laplace's equation (5) 4u=0 On surfaces separating material of different resistivities, . . . .

Автор: P.L. Butzer; E. G?rlich; B. Sz?kefalvi-Nagy
Название: Functional Analysis and Approximation
ISBN: 303489371X ISBN-13(EAN): 9783034893718
Издательство: Springer
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Описание: These Proceedings form a record of the lectures presented at the interna- tional Conference on Functional Analysis and Approximation held at the Ober- wolfach Mathematical Research Institute, August 9-16, 1980.