Courant, Richard David Hilbert creator text Weinheim John Wiley & Sons 2004 monographic xv, 560 p. ; 23.5 cm. Vol . 1 Vol . 2 Mathematical physics Mathematics Linear transformation Quadratic form Arbitrary function Integral wquation Differential equation Potential theory Math RICAS 530.15 COU 0471504475 (pbk) 9780471504474 (pbk)