Representations for weighted Moore-Penrose inverses of partitioned adjointable operators

Details Representations for weighted Moore-Penrose inverses of partitioned adjointable operators Representations for weighted Moore-Penrose inverses of partitioned adjointable operators

2010-08-04

arxiv.org/abs/1008.0887v1

Mathematics

Operator Algebras

20 pages

Scientific paper

For two positive definite adjointable operators $M$ and $N$, and an adjointable operator $A$ acting on a Hilbert $C^*$-module, some properties of the weighted Moore-Penrose inverse $A^\dag_{MN}$ are established. When $A=(A_{ij})$ is $1\times 2$ or $2\times 2$ partitioned, general representations for $A^\dag_{MN}$ in terms of the individual blocks $A_{ij}$ are studied. In case $A$ is $1\times 2$ partitioned, a unified representation for $A^\dag_{MN}$ is presented. In the $2\times 2$ partitioned case, an approach to constructing Moore-Penrose inverses from the non-weighted case to the weighted case is provided. Some results known for matrices are generalized in the general setting of Hilbert $C^*$-module operators.

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