00448nam a22001217a 4500020002400000082001600024100002000040245005700060260003600117300003700153500005000190650008600240  a9780387950006 (pbk)  a515.35bOLV  aOlver, Peter J.  aApplications of Lie groups to differential equations  aNew YorkbSpringer-verlagc2000  axxviii, 513 p.b: ill.c; 24 cm.  aIncludes bibliographical references and index  aDifferential equations vLie algebravVector fieldsvProlongationvTopologyvFBSH