Numerical approximation of partial differential equations : selection of papers presented at the International Symposium on Numerical Analysis, held at the Polytechnic University of Madrid, September 17-19, 1985 / edited by Eduardo L. Ortiz. International Symposium on Numerical Analysis (1st : 1985 : Polytechnic University of Madrid) Ortiz, Eduardo L. Differential equations Numerical solutions Congresses. QA370 .I576 1985 515.35 19 ORN Includes bibliographies. Amsterdam ; New York : North-Holland ; New York, N.Y., U.S.A. : Sole distributors for the U.S.A. and Canada, Elsevier Science Pub. Co., 1987. 1987. 1987 Text xii, 433 p. : eng North-Holland mathematics studies ; 133