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Wyszukujesz frazę "existence solutions" wg kryterium: Temat


Tytuł:
Nonlinear Choquard equations on hyperbolic space
Autorzy:
He, Haiyang
Powiązania:
https://bibliotekanauki.pl/articles/2216225.pdf
Data publikacji:
2022
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
nonlinear Choquard equation
hyperbolic space
existence solutions
Hardy-Littlewood-Sobolev inequality
Opis:
In this paper, our purpose is to prove the existence results for the following nonlinear Choquard equation $ -\Delta_{ \mathbb{B}^{N} } u = \int_{\mathbb{B}^N} \frac{ |u(y)|^p } { | 2 \text{sin} \frac{ p(T_y(x)) }{ 2 } |^u } dV_y \cdot |u|^{p-2} u + \lambda u $ on the hyperbolic space BN, where ΔBN denotes the Laplace–Beltrami operator on BN, $ \text{sin} \text{h} \frac{\rho(T_y(x))}{2} = \frac{|T_y(x)|}{\sqrt{1-|T_y(x)|^2}} = \frac{ |x-y|}{\sqrt{(1-|x|^2)(1-|y|^2)} $ , λ is a real parameter, 0 < μ < N, 1 < p ≤ 2∗μ,N ≥ 3 and [formula] is the critical exponent in the sense of the Hardy–Littlewood–Sobolev inequality.
Źródło:
Opuscula Mathematica; 2022, 42, 5; 691-708
1232-9274
2300-6919
Pojawia się w:
Opuscula Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A class of nonlocal parabolic problems occurring in statistical mechanics
Autorzy:
Biler, Piotr
Nadzieja, Tadeusz
Powiązania:
https://bibliotekanauki.pl/articles/967215.pdf
Data publikacji:
1993
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Tematy:
nonlinear boundary conditions
stationary solutions
existence of solutions
parabolic-elliptic system
Opis:
We consider parabolic equations with nonlocal coefficients obtained from the Vlasov-Fokker-Planck equations with potentials. This class of equations includes the classical Debye system from electrochemistry as well as an evolution model of self-attracting clusters under friction and fluctuations. The local in time existence of solutions to these equations (with no-flux boundary conditions) and properties of stationary solutions are studied.
Źródło:
Colloquium Mathematicum; 1993, 66, 1; 131-145
0010-1354
Pojawia się w:
Colloquium Mathematicum
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Existence and nonexistence of solutions for a model of gravitational interaction of particles, I
Autorzy:
Biler, Piotr
Nadzieja, Tadeusz
Powiązania:
https://bibliotekanauki.pl/articles/967263.pdf
Data publikacji:
1993
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Tematy:
nonlinear boundary conditions
stationary solutions
global existence of solutions
parabolic-elliptic system
Opis:
We study the existence of stationary and evolution solutions to a parabolic-elliptic system with natural (no-flux) boundary conditions describing the gravitational interaction of particles.
Źródło:
Colloquium Mathematicum; 1993, 66, 2; 319-334
0010-1354
Pojawia się w:
Colloquium Mathematicum
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Greens functions and existence of solutions of nonlinear fractional implicit difference equations with Dirichlet boundary conditions
Autorzy:
Cabada, Alberto
Dimitrov, Nikolay D.
Jonnalagadda, Jagan Mohan
Powiązania:
https://bibliotekanauki.pl/articles/29519501.pdf
Data publikacji:
2024
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
fractional difference
Dirichlet conditions
Green’s function
existence of solutions
Opis:
This article is devoted to deduce the expression of the Green’s function related to a general constant coefficients fractional difference equation coupled to Dirichlet conditions. In this case, due to the points where some of the fractional operators are applied, we are in presence of an implicit fractional difference equation. So, due to such a property, it is more complicated to calculate and manage the expression of the Green’s function than in the explicit case studied in a previous work of the authors. Contrary to the explicit case, where it is shown that the Green’s function is constructed as finite sums, the Green’s function constructed here is an infinite series. This fact makes necessary to impose more restrictive assumptions on the parameters that appear in the equation. The expression of the Green’s function will be deduced from the Laplace transform on the time scales of the integers. We point out that, despite the implicit character of the considered equation, we can have an explicit expression of the solution by means of the expression of the Green’s function. These two facts are not incompatible. Even more, this method allows us to have an explicit expression of the solution of an implicit problem. Finally, we prove two existence results for nonlinear problems, via suitable fixed point theorems.
Źródło:
Opuscula Mathematica; 2024, 44, 2; 167-195
1232-9274
2300-6919
Pojawia się w:
Opuscula Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Existence and nonexistence of solutions for a model of gravitational interaction of particles, II
Autorzy:
Biler, Piotr
Hilhorst, Danielle
Nadzieja, Tadeusz
Powiązania:
https://bibliotekanauki.pl/articles/967183.pdf
Data publikacji:
1994
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Tematy:
nonlinear boundary conditions
blowing-up solutions
global existence of solutions
parabolic-elliptic system
Opis:
We study the existence and nonexistence in the large of radial solutions to a parabolic-elliptic system with natural (no-flux) boundary conditions describing the gravitational interaction of particles. The blow-up of solutions defined in the n-dimensional ball with large initial data is connected with the nonexistence of radial stationary solutions with a large mass.
Źródło:
Colloquium Mathematicum; 1994, 67, 2; 297-308
0010-1354
Pojawia się w:
Colloquium Mathematicum
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An initial value problem fora third order differential equation
Autorzy:
Mydlarczyk, Wojciech
Powiązania:
https://bibliotekanauki.pl/articles/1311663.pdf
Data publikacji:
1994
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Tematy:
nonlinear Volterra integral equation
existence and uniqueness of solutions
Opis:
For an initial value problem u'''(x) = g(u(x)), u(0) = u'(0) = u''(0) = 0, x > 0, some theorems on existence and uniqueness of solutions are established.
Źródło:
Annales Polonici Mathematici; 1994, 59, 3; 215-223
0066-2216
Pojawia się w:
Annales Polonici Mathematici
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optimal control of systems determined by strongly nonlinear operator valued measures
Autorzy:
Ahmed, N.
Powiązania:
https://bibliotekanauki.pl/articles/729396.pdf
Data publikacji:
2008
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
evolution equations
strongly nonlinear operator valued measures
existence of solutions
regularity properties
optimal control
Opis:
In this paper we consider a class of distributed parameter systems (partial differential equations) determined by strongly nonlinear operator valued measures in the setting of the Gelfand triple V ↪ H ↪ V* with continuous and dense embeddings where H is a separable Hilbert space and V is a reflexive Banach space with dual V*. The system is given by
dx + A(dt,x) = f(t,x)γ(dt) + B(t)u(dt), x(0) = ξ, t ∈ I ≡ [0,T]
where A is a strongly nonlinear operator valued measure mapping Σ × V to V* with Σ denoting the sigma algebra of subsets of the set I and f is a nonlinear operator mapping I × H to H, γ is a countably additive bounded positive measure and the control u is a suitable vector measure. We present existence, uniqueness and regularity properties of weak solutions and then prove the existence of optimal controls (vector valued measures) for a class of control problems.
Źródło:
Discussiones Mathematicae, Differential Inclusions, Control and Optimization; 2008, 28, 1; 165-189
1509-9407
Pojawia się w:
Discussiones Mathematicae, Differential Inclusions, Control and Optimization
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Cahn-Hilliard-Gurtin system coupled with elasticity
Autorzy:
Bartkowiak, L.
Pawłow, I.
Powiązania:
https://bibliotekanauki.pl/articles/970978.pdf
Data publikacji:
2005
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
Cahn-Hilliard-Gurtin model
phase separation
elasticity system
existence of weak solutions
Opis:
The paper concerns the existence of weak solutions to the Cahn-Hilliard-Gurtin system coupled with nonstationary elasticity. The system describes phase separation process in elastically stressed material. It generalizes the Cahu-Hilliard equation by admitting a more general structure and by coupling diffusive and elastic effects. The system is studied with the help of a singularly perturbed problem which has the form of a well-known phase field model coupled with elasticity. The established existence results are restricted to the homogeneous problem with gradient, energy tensor and elasticity tensor independent of the order parameter.
Źródło:
Control and Cybernetics; 2005, 34, 4; 1005-1043
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Vector and operator valued measures as controls for infinite dimensional systems: optimal control
Autorzy:
Ahmed, N.
Powiązania:
https://bibliotekanauki.pl/articles/729468.pdf
Data publikacji:
2008
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
evolution equations
Banach spaces
operator valued measures
strong operator topology
existence of solutions
optimal control
Opis:
In this paper we consider a general class of systems determined by operator valued measures which are assumed to be countably additive in the strong operator topology. This replaces our previous assumption of countable additivity in the uniform operator topology by the weaker assumption. Under the relaxed assumption plus an additional assumption requiring the existence of a dominating measure, we prove some results on existence of solutions and their regularity properties both for linear and semilinear systems. Also presented are results on continuous dependence of solutions on operator and vector valued measures, and other parameters determining the system which are then used to prove some results on control theory including existence and necessary conditions of optimality. Here the operator valued measures are treated as structural controls. The paper is concluded with some examples from classical and quantum mechanics and a remark on future direction.
Źródło:
Discussiones Mathematicae, Differential Inclusions, Control and Optimization; 2008, 28, 1; 95-131
1509-9407
Pojawia się w:
Discussiones Mathematicae, Differential Inclusions, Control and Optimization
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On the existence for the Cauchy-Neumann problem for the Stokes system in the $L_p$-framework
Autorzy:
Mucha, Piotr
Zajączkowski, Wojciech
Powiązania:
https://bibliotekanauki.pl/articles/1205939.pdf
Data publikacji:
2000
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Tematy:
Stokes system
Marcinkiewicz theorem
Cauchy-Neumann initial boundary value problem
the Fourier transform
existence of solutions
Opis:
The existence for the Cauchy-Neumann problem for the Stokes system in a bounded domain $Ω ⊂ ℝ^3$ is proved in a class such that the velocity belongs to $W^{2,1}_r (Ω × (0,T))$, where r > 3. The proof is divided into three steps. First, the existence of solutions is proved in a half-space for vanishing initial data by applying the Marcinkiewicz multiplier theorem. Next, we prove the existence of weak solutions in a bounded domain and then we regularize them. Finally, the problem with nonvanishing initial data is considered.
Źródło:
Studia Mathematica; 2000, 143, 1; 75-101
0039-3223
Pojawia się w:
Studia Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Generic properties of generalized hyperbolic partial differential equations
Autorzy:
Bielawski, Dariusz
Powiązania:
https://bibliotekanauki.pl/articles/1311695.pdf
Data publikacji:
1994
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Tematy:
Darboux problem
generic property
existence and uniqueness of solutions
Bielecki's norms
Opis:
The existence and uniqueness of solutions and convergence of successive approximations are considered as generic properties for generalized hyperbolic partial differential equations with unbounded right-hand sides.
Źródło:
Annales Polonici Mathematici; 1994, 59, 2; 107-115
0066-2216
Pojawia się w:
Annales Polonici Mathematici
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fractional problems with right-handed Riemann-Lioville fractional derivatives
Autorzy:
Jankowski, T.
Powiązania:
https://bibliotekanauki.pl/articles/1938600.pdf
Data publikacji:
2016
Wydawca:
Politechnika Gdańska
Tematy:
right-handed Riemann-Liouville fractional derivatives
nonlinear boundary problems
linear problems
existence of solutions
Mittag-Leffler functions
Opis:
In this paper, we investigate the existence of solutions for advanced fractional differential equations containing the right-handed Riemann-Liouville fractional derivative both with nonlinear boundary conditions and also with initial conditions given at the end point T of interval [0,T]. We use both the method of successive approximations, the Banach fixed point theorem and the monotone iterative technique, as well. Linear problems are also discussed. A few examples illustrate the results.
Źródło:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2016, 20, 1; 63-83
1428-6394
Pojawia się w:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On the existence of optimal solutions to the Lagrange problem governed by a nonlinear Goursat-Darboux problem of fractional order
Autorzy:
Majewski, Marek
Powiązania:
https://bibliotekanauki.pl/articles/29519373.pdf
Data publikacji:
2023
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
fractional partial derivative
fractional boundary problem
existence of optimal solutions
Lagrange problem
lower closure theorem
Opis:
In the paper, the Lagrange problem given by a fractional boundary problem with partial derivatives is considered. The main result is the existence of optimal solutions based on the convexity assumption of a certain set. The proof is based on the lower closure theorem and the appropriate implicit measurable function theorem.
Źródło:
Opuscula Mathematica; 2023, 43, 4; 547-558
1232-9274
2300-6919
Pojawia się w:
Opuscula Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optimal control for a steady state dead oil isotherm problem
Autorzy:
Sidi Ammi, M. R.
Malinowska, A. B.
Torres, D. F. M.
Powiązania:
https://bibliotekanauki.pl/articles/205514.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
dead oil isotherm problem
optimal control
existence and regularity of solutions
necessary optimality conditions
Opis:
We study the optimal control of a steady-state dead oil isotherm problem. The problem is described by a system of nonlinear partial differential equations resulting from the traditional modelling of oil engineering within the framework of mechanics of a continuous medium. Existence and regularity results of the optima control are proved, as well as necessary optimality conditions.
Źródło:
Control and Cybernetics; 2013, 42, 2; 459-470
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Systems of differential inclusions in the absence of maximum principles and growth conditions
Autorzy:
Tisdell, Christopher
Powiązania:
https://bibliotekanauki.pl/articles/729443.pdf
Data publikacji:
2006
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
boundary value problem
systems of differential inclusions
existence of solutions
a priori bounds
two-point boundary conditions
three-point boundary conditions
Opis:
This article investigates the existence of solutions to second-order boundary value problems (BVPs) for systems of ordinary differential inclusions. The boundary conditions may involve two or more points. Some new inequalities are presented that guarantee a priori bounds on solutions to the differential inclusion under consideration. These a priori bound results are then applied, in conjunction with appropriate topological methods, to prove some new existence theorems for solutions to systems of BVPs for differential inclusions. The new conditions allow the treatment of systems of BVPs in the absence of maximum principles and growth conditions. The results are also new for differential equations involving Carathéodory or even continuous right-hand sides.
Źródło:
Discussiones Mathematicae, Differential Inclusions, Control and Optimization; 2006, 26, 1; 129-141
1509-9407
Pojawia się w:
Discussiones Mathematicae, Differential Inclusions, Control and Optimization
Dostawca treści:
Biblioteka Nauki
Artykuł

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