Results 1 to 10 of about 4,363,238 (170)

Final Value Problems for Parabolic Differential Equations and Their Well-Posedness [PDF]

open access: yesAxioms, 2018
This article concerns the basic understanding of parabolic final value problems, and a large class of such problems is proved to be well posed. The clarification is obtained via explicit Hilbert spaces that characterise the possible data, giving ...
Ann-Eva Christensen, Jon Johnsen
doaj   +10 more sources

A Class of Well-Posed Parabolic Final Value Problems [PDF]

open access: yes, 2020
This paper focuses on parabolic final value problems, and well-posedness is proved for a large class of these. The clarification is obtained from Hilbert spaces that characterise data that give existence, uniqueness and stability of the solutions.
A Pazy   +17 more
openaire   +4 more sources

On parabolic final value problems and well-posedness [PDF]

open access: yesComptes Rendus. Mathématique, 2018
We prove that a large class of parabolic final value problems is well posed. This results via explicit Hilbert spaces that characterise the data yielding existence, uniqueness and stability of solutions. This data space is the graph normed domain of an unbounded operator, which represents a new compatibility condition pertinent for final value problems.
Christensen, Ann-Eva, Johnsen, Jon
openaire   +6 more sources

Boundary control problem for a hyperbolic equation loaded along one of its characteristics [PDF]

open access: yesҚарағанды университетінің хабаршысы. Математика сериясы, 2022
This paper investigates the unique solvability of the boundary control problem for a one-dimensional wave equation loaded along one of its characteristic curves in terms of a regular solution. The solution method is based on an analogue of the d’
A.Kh. Attaev
doaj   +3 more sources

A modified quasi-boundary value method for a class of abstract parabolic ill-posed problems

open access: yesBoundary Value Problems, 2006
We study a final value problem for first-order abstract differential equation with positive self-adjoint unbounded operator coefficient. This problem is ill-posed.
S. Djezzar, M. Denche
doaj   +4 more sources

Research of the Solutions Proximity of Linearized and Nonlinear Problems of the Biogeochemical Process Dynamics in Coastal Systems

open access: yesMathematics, 2023
The article considers a non-stationary three-dimensional spatial mathematical model of biological kinetics and geochemical processes with nonlinear coefficients and source functions.
Alexander Sukhinov   +3 more
doaj   +1 more source

Sufficient Conditions for the Existence and Uniqueness of the Solution of the Dynamics of Biogeochemical Cycles in Coastal Systems Problem

open access: yesMathematics, 2022
The article considers a three-dimensional mathematical model of population dynamics based on a system of non-stationary parabolic advection-diffusion-reaction equations with lower derivatives describing the advective motion of the aquatic environment and
Alexander Sukhinov   +3 more
doaj   +1 more source

Klasifikasi Topik Tugas Akhir Mahasiswa menggunakan Algoritma Particle Swarm Optimization dan K-Nearest Neighbor

open access: yesIlkom Jurnal Ilmiah, 2020
Problems the Topic of the final project is a form of scientific writing that contains the results of observations from a study of the problems that occur with the use of methods related to the particular field of science.
Sumarni Sumarni, Suhardi Rustam
doaj   +1 more source

Quality Aspects in the Compounding of Plastic Recyclate

open access: yesRecycling, 2023
Compounding is the final processing step for quality adjustment and control before recycled thermoplastic polymer material can be introduced into production processes.
Maximilian Auer   +6 more
doaj   +1 more source

Final Value Problem for Parabolic Equation with Fractional Laplacian and Kirchhoff’s Term

open access: yesJournal of Function Spaces, 2021
In this paper, we study a diffusion equation of the Kirchhoff type with a conformable fractional derivative. The global existence and uniqueness of mild solutions are established. Some regularity results for the mild solution are also derived. The main tools for analysis in this paper are the Banach fixed point theory and Sobolev embeddings.
Nguyen Hoang Luc   +3 more
openaire   +3 more sources

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