In the framework of second order elliptic boundary value problems, we describe the main features of the singular solutions near vertices and edges of a polyhedron, and we discuss some difficulties arising from the presence of these singularities.
Published in Actes du 30ème Congrès d'Analyse Numérique: CANum '98 (Arles, 1998).
Journal ESAIM Proc. 6, 1999, 19--40 (electronic).
Editor Soc. Math. Appl. Indust. Paris
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