TY - BOOK AU - Egorov,Iurii Vladimirovich AU - Shubin,Mikhail Aleksandrovich TI - Partial differential equations I: foundations of the classical theory T2 - Encyclopaedia of mathematical sciences SN - 0-387-52002-3 U1 - 515.353 20 PY - 1992/// CY - Berlin, London PB - Springer-Verlag KW - Ecuaciones en derivadas parciales KW - Differential equations N1 - Includes bibliographical references and index ER -