00440nam a2200145 a 450000500170000000800410001704100080005808200110006610000320007724500700010926400350017930000240021465000260023870000300026420260717091035.0260717s1970    ii            000 0 eng d  aeng04a530.151 aCourant, Richard, 1888-197210aMethods mathematical physics vol.I /cCourant, Richard, 1888-1972 1aDelhi :bWiley eastern,c1970.  axv, 561 p. ; 21 cm. 4aMathematical physics.1 aHilbert, David, 1862-1943