The objective of this work is to study the space of polyhedra with vertices of conical angles between 0 and 2π. By polyhedron we will understand a homeomorphic surface to the sphere provided with a flat metric except for ...

In the following text for arbitrary X with at least two elements, nonempty set Γ and self-map φ: Γ → Γ, we prove the set-theoretical entropy of generalized shift σφ: XΓ → XΓ (σφ((xα)α ∈ Γ) = (xφ(α))α ∈ Γ (para (xα)α ∈ Γ ∈ ...

In this paper, the mono and bimetallic catalysts of Rh, Pt and Ni supported on γ-Al2O3 were tested for the selective acetalization of furfural to produce furfural diethyl acetal in a mixture containing furfural diluted in ...

In this study, monolayers formed from organophosphonic acids were employed to stabilize porous γ-Al2O3, both as a single component and as a support for Pt nanoparticle catalysts, during exposure to hydrothermal conditions. ...

The reduction of NO by CO over Pd/γ-Al2O3 and Pd-VOx/γ-Al2O3 catalysts has been studied by combining activity and selectivity measurements with FTIR spectroscopy of gas phase products and adsorbed species under reaction ...