Moore-Penrose Inverse in Indefinite Inner Product Spaces

Ivana Radojević, Dragan S. Djordjević


We present the denition and some properties for the Moore-Penrose
inverse in possibly degenerate indenite inner product spaces. The extensions
of appropriate results, given for matrices in Euclidean and
nondegenerate indenite inner product spaces are established. All this
is done by using the concept of linear relations.

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