5 citations · 17 across the 5 of their papers we have counts for
5 papers
Large data pointwise decay for defocusing semilinear wave equations
Roger Bieli, Nikodem Szpak
We generalize the pointwise decay estimates for large data solutions of the defocusing semilinear wave equations which we obtained earlier under restriction to spherical symmetry.…
Global pointwise decay estimates for defocusing radial nonlinear wave equations
Roger Bieli, Nikodem Szpak
We prove global pointwise decay estimates for a class of defocusing semilinear wave equations in dimensions restricted to spherical symmetry. The technique is based on a conf…
Accelerated expansion by non-minimally coupled scalar fields
Roger Bieli
In a class of spatially homogeneous cosmologies including those of Bianchi type I--VIII mathematical results are presented which show that a scalar field non-minimally coupled to t…
Coupled quintessence and curvature-assisted acceleration
Roger Bieli
Spatially homogeneous models with a scalar field non-minimally coupled to the space-time curvature or to the ordinary matter content are analysed with respect to late-time asymptot…
Algebraic expansions for curvature coupled scalar field models
Roger Bieli
A late time asymptotic perturbative analysis of curvature coupled complex scalar field models with accelerated cosmological expansion is carried out on the level of formal power se…