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The pseudo-inverse of a product. (English) Zbl 0236.47007

MSC:
47A99 General theory of linear operators
47C99 Individual linear operators as elements of algebraic systems
47A10 Spectrum, resolvent
47A15 Invariant subspaces of linear operators
15A09 Theory of matrix inversion and generalized inverses
15A60 Norms of matrices, numerical range, applications of functional analysis to matrix theory
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