In this work, the concepts of isometry, unitary and partial isometry on a Hilbert space are generalized when an additional semi-inner product is considered. These new concepts are described by means of oblique projections.

In this work we extend Cordes inequality, McIntosh inequality and CPR-inequality for the operator seminorm defined by a positive semidefinite bounded linear operator A.

Several results on norms of projections on a Hilbert space H are extended for the operator seminorm defined by a positive semidefinite operator A,∈,L(H)+.

In this work we study the relationship between A-partial isometries and generalized inverses.

Let A be a positive (semidefinite) bounded linear operator on a complex Hilbert space (H, ⟨ · , · ⟩). The semi-inner product induced by A is defined by ⟨ x, y⟩ A: = ⟨ Ax, y⟩ for all x, y∈ H and defines a seminorm ‖ · ‖ A ...

The present study performed an analysis of the ultrastructural changes induced by andiroba seed oil in the synganglion of Rhipicephalus sanguineus female ticks, aiming to provide scientific grounds to help in the creation ...

In this work we propose, implement and evaluate strategies and techniques for the problem of extracting semistructured data fromWeb data sources within the context of an approach we call DEByE (Data Extraction By Example). ...

This work develops a program (MVSEPS) to simulate a multi-vessel SuperCritical Fluid Extraction (SCFE) plant operating in a counter-current fashion. MVSEPS was applied to an SCFE to extract hemp seed oil using the shrinking ...

Biophysical simulation models can help to satisfactorily estimate the crop performance for grain production, their stability across years and their impact on components of hydrological balance in diverse areas once those ...