00509nam a2200229Ia 4500003000400000005001700004006001900021007000300040008004100043024001000084037001200094040001800106041000800124082002000132100001400152245003500166260000900201300001200210650002600222650001600248700001500264OSt20220912152039.0a|||||r|||| 00| 0 ta220909b        |||||||| |||| 00| 0 eng d  a60878  cTextual  aCSLbengcCSL  aeng  aB0C, J51.1;5-;7  aCourant R 0aMethods of mathematics physics  c1955  ap.ccm.  a Mathematical physics  aMathematics  a Hilbert D