Results 21 to 30 of about 146,108 (290)

Early evolution of fully convective stars in scalar–tensor gravity

open access: yesEuropean 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

A Finite Difference Representation of Neutrino Radiation Hydrodynamics in Spherically Symmetric General Relativistic Space-Time [PDF]

open access: yes, 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

Quasilinear degenerate evolution equations in Banach spaces [PDF]

open access: yesJournal of Evolution Equations, 2004
The paper is concerned with the Cauchy problem for the quasilinear degenerate evolution equation of parabolic type in a Banach space \(X\): \[ {{dMv}\over{dt}} +L(Mv)v=F(Mv), \quad \;Mv(0)=u_0, \quad ...
FAVINI, ANGELO, A. Yagi
openaire   +2 more sources

Well-posedness for mean-field evolutions arising in superconductivity [PDF]

open access: yes, 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

Two-Scale Homogenization of Implicit Degenerate Evolution Equations

open access: yesJournal of Mathematical Analysis and Applications, 1997
In the framework of two-scale convergence for homogenization of partial differential equations with periodic coefficients, the authors show how the two-scale method can also be applied to evolution equations, including degenerate and implicit equations, where the coefficients are \(\varepsilon\)-periodic in the space variable.
Clark, G.W., Packer, L.A.
openaire   +2 more sources

Stationary States and Asymptotic Behaviour of Aggregation Models with Nonlinear Local Repulsion [PDF]

open access: yes, 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

On the Generalized Kinetic Equation for Surface Gravity Waves, Blow-Up and Its Restraint

open access: yesFluids, 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

Regularity for degenerate evolution equations with strong absorption [PDF]

open access: yesJournal 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: $ Δ_p u - \frac{\partial u}{\partial t} = λ_0 u_{+}^q \quad \mbox{in} \quad Ω_T \defeq Ω\times (0, T), $ where $0 \leq q < 1$ and $λ_0$ is a function bounded away from zero ...
João Vitor da Silva   +2 more
openaire   +4 more sources

Degenerate Multi-Term Equations with Gerasimov–Caputo Derivatives in the Sectorial Case

open access: yesMathematics, 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

Linear Inverse Problems for Multi-term Equations with Riemann — Liouville Derivatives

open access: yesИзвестия Иркутского государственного университета: Серия "Математика", 2021
The issues of well-posedness of linear inverse coefficient problems for multi-term equations in Banach spaces with fractional Riemann – Liouville derivatives and with bounded operators at them are considered. Well-posedness criteria are obtained both for
M. M. Turov, V.E. Fedorov, B.T. Kien
doaj   +1 more source

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