Schur complements and Banachiewicz-Schur forms

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Yongge Tian
Yoshio Takane

Abstract

Through the matrix rank method, this paper gives necessary and sufficient conditions
for a partitioned matrix to have generalized inverses with Banachiewicz-Schur forms. In addition, this paper investigates the idempotency of generalized Schur complements in a partitioned idempotent matrix.

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