00280pam a2200133 a 4500020001700000040001600017041000800033082001700041100001500058245003500073250001100108260001900119300000800138  a818128318Xc  aDTUN_110042  aeng  a511.353bLOG  aLogan ,J D  aPartial differential equations  a2nd ed  bSpringerc2006  a209