00444nam a2200157 a 450000500170000000800410001704100080005808200110006610000320007724500730010926400260018230000110020865000250021965000120024470000300025620260717090948.0260717s1975    ii            000 0 eng d  aeng04a530.151 aCourant, Richard, 1888-197210aMethods of mathematical physics vol.I /cCourant, Richard, 1888-1972 1bWiley Eastern,c1975.  a561 p. 4aMathematical physics 4aPhysics1 aHilbert, David, 1862-1943