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Generalized inverses of linear operators. Representation and approximation. (English) Zbl 0358.47001


MSC:

47-01 Introductory exposition (textbooks, tutorial papers, etc.) pertaining to operator theory
47A50 Equations and inequalities involving linear operators, with vector unknowns
15A09 Theory of matrix inversion and generalized inverses
65J05 General theory of numerical analysis in abstract spaces
90C99 Mathematical programming
41A60 Asymptotic approximations, asymptotic expansions (steepest descent, etc.)
41A65 Abstract approximation theory (approximation in normed linear spaces and other abstract spaces)