18 citations · 55 across the 29 of their papers we have counts for
4 papers · 1 filter
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…
Index of Hadamard multiplication by positive matrices II
G. Corach, D. Stojanoff
Given a definite nonnegative matrix , we study the minimal index of A: for all , where denotes the Hada…
Projective spaces of a C*-algebra
E. Andruchow, G. Corach, D. Stojanoff
Based on the projective matrix spaces studied by B. Schwarz and A. Zaks, we study the notion of projective space associated to a C*-algebra A with a fixed projection p. The resulti…
Geometry of oblique projections
E. Andruchow, G. Corach, D. Stojanoff
Let A be a unital C*-algebra. Denote by P the space of selfadjoint projections of A. We study the relationship between P and the spaces of projections P_a determined by the differe…