7 citations · 7 across the 5 of their papers we have counts for
9 papers
Projections in operator ranges
Gustavo Corach, Alejandra Maestripieri, Demetrio Stojanoff
If $\H$ is a Hilbert space, is a positive bounded linear operator on $\cH$ and $\cS$ is a closed subspace of $\cH$, the relative position between $\cS$ and $A^{-1}(\cS \orto)$…
Bilateral Shorted Operators and Parallel Sums
Jorge Antezana, Gustavo Corach, Demetrio Stojanoff
In this paper we study shorted operators relative to two different subspaces, for bounded operators on infinite dimensional Hilbert spaces. We define two notions of complementabili…
The Schur-Horn theorem for operators and frames with prescribed norms and frame operator
J. Antezana, P. Massey, M. Ruiz +1
Let be a Hilbert space. Given a bounded positive definite operator on , and a bounded sequence of non negativ…
Jensen's Inequality and majorization
Jorge Antezana, Pedro Massey, Demetrio Stojanoff
Let be a -algebra and $ϕ:\cA\to L(H)$ be a positive unital map. Then, for a convex function defined on some open interval and a self-adjoint…
Spectral shorted operators
Jorge Antezana, Gustavo Corach, Demetrio Stojanoff
If is a Hilbert space, is a closed subspace of , and is a positive bounded linear operator on , the spec…
Projective space of a C*-module
E. Andruchow, G. Corach, D. Stojanoff
Let X be a right Hilbert C*-module over A. We study the geometry and the topology of the projective space P(X) of X, consisting of the orthocomplemented submodules of X which are g…