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math.FA2018
Schur complements of selfadjoint Krein space operators
Maximiliano Contino, Alejandra Maestripieri, Stefania Marcantognini
Given a bounded selfadjoint operator W on a Krein space H and a closed subspace S of H, the Schur complement of W to S is defined under the hypothesis of weak complementability. A…
math.FA2018
Shorted operators and minus order
Maximiliano Contino, Juan Ignacio Giribet, Alejandra Maestripieri
Let be a Hilbert space, the algebra of bounded linear operators on and a positive operator. Given a closed subsp…