00325nam a2200109Ia 4500008004100000040003800041100001900079245004000098260003200138300001800170653002700188211215s9999    xx            000 0 und d  cJayakar Knowledge Resource Centre  aDenn, Morton M 0aOptimization by variational methods  bMcGraw HillaNew Yorkc1969  axviii,419p p.  aVariational Principles