Results 31 to 40 of about 40,571 (332)

Carleman inequality for a class of super strong degenerate parabolic operators and applications

open access: yesElectronic Journal of Qualitative Theory of Differential Equations, 2023
In this paper, we present a new Carleman estimate for the adjoint equations associated to a class of super strong degenerate parabolic linear problems. Our approach considers a standard geometric imposition on the control domain, which can not be removed
Bruno Sรฉrgio Araรบjo   +2 more
doaj   +1 more source

A new method for large time behavior of degenerate viscous Hamilton--Jacobi equations with convex Hamiltonians [PDF]

open access: yes, 2015
We investigate large-time asymptotics for viscous Hamilton--Jacobi equations with possibly degenerate diffusion terms. We establish new results on the convergence, which are the first general ones concerning equations which are neither uniformly ...
Barles   +24 more
core   +1 more source

Multiplicative controllability for nonlinear degenerate parabolic equations between sign-changing states

open access: yes, 2020
In this paper we study the global approximate multiplicative controllability for nonlinear degenerate parabolic Cauchy problems. In particular, we consider a one-dimensional semilinear degenerate reaction-diffusion equation in divergence form governed ...
Floridia, Giuseppe   +2 more
core   +1 more source

Embedding Operators in Vector-Valued Weighted Besov Spaces and Applications

open access: yesJournal of Function Spaces and Applications, 2012
The embedding theorems in weighted Besov-Lions type spaces ๐ต๐‘™,๐‘ ๐‘,๐‘ž,๐›พ (ฮฉ;๐ธ0,๐ธ) in which ๐ธ0,๐ธ are two Banach spaces and ๐ธ0โŠ‚๐ธ are studied. The most regular class of interpolation space ๐ธ๐›ผ between ๐ธ0 and E is found such that the mixed differential operator ...
Veli Shakhmurov
doaj   +1 more source

On the Weak Characteristic Function Method for a Degenerate Parabolic Equation

open access: yesJournal of Function Spaces, 2019
For a nonlinear degenerate parabolic equation, how to impose a suitable boundary value condition to ensure the well-posedness of weak solutions is a very important problem.
Huashui Zhan
doaj   +1 more source

Fundamental solutions for degenerate parabolic equations [PDF]

open access: yesActa Mathematica, 1974
This chapter explains the construction of a candidate for a fundamental solution and the existence, smoothness, and certain bounds for a fundamental solution ฮ“. The underlying assumptions were that ( a ij , ( x )) is uniformly positive definite and a ij , b i are bounded and uniformly Holder continuous. The chapter presents a proof of how if a ij ,
openaire   +4 more sources

Uniqueness of Entropy Solutions of Nonlinear Elliptic-Parabolic-Hyperbolic Problems in One Dimension Space [PDF]

open access: yes, 2009
We consider a class of elliptic-parabolic-hyperbolic degenerate equations of the form b(u)t โ€” a(u, φ(ux)x= f with homogeneous Dirichlet conditions and initial conditions.
Ouaro, Stanislas
core   +2 more sources

$L^1$ contraction for bounded (non-integrable) solutions of degenerate parabolic equations [PDF]

open access: yes, 2014
We obtain new $L^1$ contraction results for bounded entropy solutions of Cauchy problems for degenerate parabolic equations. The equations we consider have possibly strongly degenerate local or non-local diffusion terms.
Endal, J., Jakobsen, E. R.
core   +3 more sources

Second order mean field games with degenerate diffusion and local coupling [PDF]

open access: yes, 2014
We analyze a (possibly degenerate) second order mean field games system of partial differential equations. The distinguishing features of the model considered are (1) that it is not uniformly parabolic, including the first order case as a possibility ...
Cardaliaguet, Pierre   +3 more
core   +5 more sources

Liouville properties and critical value of fully nonlinear elliptic operators [PDF]

open access: yes, 2016
We prove some Liouville properties for sub- and supersolutions of fully nonlinear degenerate elliptic equations in the whole space. Our assumptions allow the coefficients of the first order terms to be large at infinity, provided they have an appropriate
Bardi, Martino, Cesaroni, Annalisa
core   +2 more sources

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