Project supported by the Department of Energy (No. DE-FG02-03ER25587), the Office of Naval Research(No. N00014-01-1-0674), an Alfred P. Sloan Research Fellowship and a startup grant from University of
<正>A new approach to construct a new 4×4 matrix spectral problem from a normal 2×2 matrix spectral problem is presented.AKNS spectral problem is disc
<正>Motivated by the results of J.Y.Chemin in'J.Anal.Math.,77,1999,27- 50'and G.Furioli et al in'Revista Mat.Iberoamer.,16,2002,605-667',the aut