Summary
In this note we consider so called “p-analytic” mappings of simply or doubly connected domains on rectangles or circular rings. Real and imaginary parts of the mappings can be described by minimal-principles. By minimizing the corresponding functionals in a class of linear or bilinear finite elements we obtain an approximation of the mapping and also upper and lower bounds for the “p-module” of a domain with polygonal boundary. Error bounds are given for smooth and for piecewise constant functionsp. We present numerical experiments.
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Literatur
Agmon S (1965) Lectures on elliptic boundary value problems. Van Nostrand, Princeton
Babuška I, Kellogg RB (1972) Numerical solution of the neutron diffusion equation in the presence of corners and interfaces Numerical Reactor Calculations, IAEA-SM 154/59:473–486
Bramble JH, Nitsche JA, Schatz H (1975) Maximum-norm interior estimates for Ritz-Galerkin methods. Math Comput 29:677–688
Daly P (1973) Singularities in transmission lines. In: The mathematics of finite elements and applications, Whiteman JR (ed), p 337, Academic Press, New York
Gaier D (1972) Ermittlung des konformen Moduls von Vierecken mit Differenzenmethoden. Numer Math 19:179–194
Grisvard P (1976) Behavior of the solutions of an elliptic boundary value problem in a polygonal or polyhedral domain. In: Numerical solution of partial differential equations III, Synspade 1975. Hubbard B (ed) p 207, Academic Press, New York
Il'in VP (1959) Some inequalities in function spaces and their application to the investigation of the convergence of variational processes. Trudy Mat Inst Steklov 53:64–127
Kellogg RB (1971) Singularities in interface problems. In: Numerical solution of partial differential equations II, Synspade 1970. Hubbard B (ed) p 351, Academic Press, New York
Kellogg RB (1972) Higher order singularities for interface problems. In: The mathematical foundations of the finite element method with applications to partial differential equations. Aziz A (ed) p 589, Academic Press, New York
Kondrat'ev VA (1967) Boundary problems for elliptic equations in domains with conical or angular points Trans Moscow Math Soc 16:227–313
Kühnau R (1964) Über gewisse Extremalprobleme der quasikonformen Abbildung. Wiss Z Martin-Luther-Univ Halle-Wittenberg, Math-Natur Reihe 13:35–40
Kühnau R (1968) Quasikonforme Abbildungen und Extremalprobleme bei Feldern in inhomogenen Medien. J Reine Angew Math 231:101–113
Künzi HP (1960) Quasikonforme Abbildungen. Springer, Berlin Göttingen Heidelberg
Lawrynowicz J (1974) Capacities as conformal quasi-invariants on pseudo-Riemannian manifolds. Rep Mathematical Phys 5: 203–217
Lehto O, Virtanen KI (1965) Quasikonforme Abbildungen. Springer, Berlin Heidelberg New York
Mastin CW, Thompson JF (1978) Discrete quasiconformal mappings. Z Angew Math Phys 29:1–11
Morley LSD (1973/74) Finite element solution of boundary-value problems with non-removable singularities. Philos Trans Roy Soc London Ser A 275:463–488
Nečas J (1967) Les méthodes directes en théorie des équations elliptiques. Masson, Paris
Nitsche JA (1968) Ein Kriterium für die Quasi-Optimalität des Ritzschen Verfahrens. Numer Math 11:346–348
Ohtsuka M (1955) Sur un théorème étoilé de Gross. Nagoya Math J 9:191–207
Papamichael N, Whiteman JR (1973) A numerical conformal transformation method for harmonic mixed boundary value problems in polygonal domains. Z Angew Math Phys 24:304–316
Weisel J (1979) Lösung singulärer Variationsprobleme durch die Verfahren von Ritz und Galerkin mit finiten Elementen-Anwendungen in der konformen Abbildung. Mitt Math Sem Gießen 138:1–150
Whiteman RJ (1975) Numerical solution of steady state diffusion problems containing singularities. In: Finite elements in fluids. vol. 2: Mathematical foundations, aerodynamics and lubrication. Gallagher RH, Oden JT, Taylor C, Zienkiewicz OC (eds) p 101, John Wiley, London
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Weisel, J. Numerische Ermittlung quasikonformer Abbildungen mit finiten Elementen. Numer. Math. 35, 201–222 (1980). https://doi.org/10.1007/BF01396316
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DOI: https://doi.org/10.1007/BF01396316