01186nam0-2200373li-450 99000013947020331620180312154823.03-11-014132-90013947USA010013947(ALEPH)000013947USA01001394720001109d1994----km-y0itay0103----baengGEApproximation procedures in nonlinear oscillation theoryNikolai A. Bobylev, Yuri M. Burman, Sergey K. KorovinBerlin ; New York [etc.]Walter de Gruyter1994operatori non lineariteoria dell'approssimazione003.85.Bobylev,Nikolai A.753591Burman,Yuri M.Korovin,Sergey K.Sistema bibliotecario di Ateneo dell' Università di SalernoRICA990000139470203316003.85 BOB0008353BKTEC1997090920001110USA01171120020403USA011621PATRY9020040406USA011610Approximation procedures in nonlinear oscillation theory1516048UNISA