00372nam a2200121Ia 4500082002000000100001800020245007300038260002700111300002900138490007300167500000500240700000500245  a515.35bW181.DS  aWalker, J. A.  aDynamical systems and evolution equations; theory and applicationsb  aNew YorkbPlenumc1980  aviii, 236p. Index, Bibl.  aMathematical concepts and methods in Science and Engineeringv v. 20  a  a