Early evolution of fully convective stars in scalar–tensor gravity
European Physical Journal C: Particles and Fields, 2023 In this work, the early evolution of low-mass fully convective stars is studied in the context of DHOST (degenerate higher order scalar-tensor) theories of gravity.
Débora Aguiar Gomes, Aneta Wojnar
doaj +1 more source
Stationary States and Asymptotic Behaviour of Aggregation Models with Nonlinear Local Repulsion [PDF]
, 2013 We consider a continuum aggregation model with nonlinear local repulsion given by a degenerate power-law diffusion with general exponent. The steady states and their properties in one dimension are studied both analytically and numerically, suggesting ...
Burger, Martin +2 more
core +1 more source
A Finite Difference Representation of Neutrino Radiation Hydrodynamics in Spherically Symmetric General Relativistic Space-Time [PDF]
, 2003 We present an implicit finite difference representation for general relativistic radiation hydrodynamics in spherical symmetry. Our code, Agile-Boltztran, solves the Boltzmann transport equation for the angular and spectral neutrino distribution ...
Anthony Mezzacappa +13 more
core +2 more sources
Evolution Equations for Non-Degenerate 2-Forms [PDF]
International Mathematics Research Notices, 2019 AbstractIn this paper we introduce several geometric flows that evolve primarily non-degenerate 2-forms, with the motivation to develop a geometric flow to approach the existence of the symplectic forms on a compact manifold that supports a non-degenerate 2-form.
openaire +1 more source
Regularity for degenerate evolution equations with strong absorption [PDF]
Journal of Differential Equations, 2018 In this manuscript, we study geometric regularity estimates for degenerate parabolic equations of $p$-Laplacian type ($2 \leq p< \infty$) under a strong absorption condition: $ _p u - \frac{\partial u}{\partial t} = _0 u_{+}^q \quad \mbox{in} \quad _T \defeq \times (0, T), $ where $0 \leq q < 1$ and $ _0$ is a function bounded away from ...
João Vitor da Silva +2 more
openaire +4 more sources
Well-posedness for mean-field evolutions arising in superconductivity [PDF]
, 2016 We establish the existence of a global solution for a new family of fluid-like equations, which are obtained in a joint work with Serfaty in certain regimes as the mean-field evolution of the supercurrent density in a (2D section of a) type-II ...
Duerinckx, Mitia
core +4 more sources
On the Generalized Kinetic Equation for Surface Gravity Waves, Blow-Up and Its Restraint
Fluids, 2018 This article is concerned with the non-linear interaction of homogeneous random ocean surface waves. Under this umbrella, numerous kinetic equations have been derived to study the evolution of the spectral action density, each employing slightly ...
David Andrade +2 more
doaj +1 more source
Generalized Adiabatic Product Expansion: A nonperturbative method of solving time-dependent Schroedinger equation [PDF]
, 1999 We outline a method based on successive canonical transformations which yields a product expansion for the evolution operator of a general (possibly non-Hermitian) Hamiltonian.
Mostafazadeh, Ali
core +2 more sources
Degenerate Multi-Term Equations with Gerasimov–Caputo Derivatives in the Sectorial Case
Mathematics, 2022 The unique solvability for the Cauchy problem in a class of degenerate multi-term linear equations with Gerasimov–Caputo derivatives in a Banach space is investigated.
Vladimir E. Fedorov, Kseniya V. Boyko
doaj +1 more source
Many-body-QED perturbation theory: Connection to the Bethe-Salpeter equation
, 2005 The connection between many-body theory (MBPT)--in perturbative and non-perturbative form--and quantum-electrodynamics (QED) is reviewed for systems of two fermions in an external field. The treatment is mainly based upon the recently developed covariant-
Adkins +44 more
core +2 more sources