ßdAPr = I + Cr R(I + Cr)   R(A)œècodimR(I + Cr) < 1ÖR(I + Cr)4ߧ±codimR(A) < 11.3 Fredholméf ;6ƒ½n2µ£Fredholméf ;6ƒ§-S 2 F(X; Y ),ÖA 2 L(X; Y )è;éfßKéfS+AèFredholméfÖ (S + A) =  (S)y²µ·Çe°Ú|^[ƒ ) ê{5â—y²µœèS 2 F(X; Y ),K3éfPl; Pr 2 L(X; Y )⁄;éfCl 2 L(X;X);Cr 2 L(Y; Y )¶ µPlS = I + Cl; SPr = I + CrœdµPl(S + A) = I + Cl + PlAøÖkµ(S + A)P = I + C + AP

Fredholm算子及其应用(2):http://www.751com.cn/shuxue/lunwen_64841.html