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Wyświetlanie 1-15 z 19
Tytuł:
Nonlinear elliptic equations involving the p-laplacian with mixed Dirichlet-Neumann boundary conditions
Autorzy:
Bonanno, Gabriele
D'Agui, Giuseppina
Sciammetta, Angela
Powiązania:
https://bibliotekanauki.pl/articles/254739.pdf
Data publikacji:
2019
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
mixed problem
critical points
Opis:
In this paper, a nonlinear differential problem involving the p-Laplacian operator with mixed boundary conditions is investigated. In particular, the existence of three non-zero solutions is established by requiring suitable behavior on the nonlinearity. Concrete examples illustrate the abstract results.
Źródło:
Opuscula Mathematica; 2019, 39, 2; 159-174
1232-9274
2300-6919
Pojawia się w:
Opuscula Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis and comparison of reliability measures of critical points
Autorzy:
Woch, M.
Powiązania:
https://bibliotekanauki.pl/articles/2069436.pdf
Data publikacji:
2012
Wydawca:
Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:
reliability
critical points
reliability index
Opis:
In this work, algorithms have been used to compare the reliability measure of helicopter structure critical points. Reliability index, Cornell’s reliability index and Hasofer-Lind’s reliability index have been calculated and analysed. Inputs to the algorithms, stress and strength were generated by using the Markov chain model based on actual flight records of helicopters. With this approach, results of methods for determining the reliability of critical points of a helicopter’s structure are properly founded.
Źródło:
Journal of Polish Safety and Reliability Association; 2012, 3, 1; 53--58
2084-5316
Pojawia się w:
Journal of Polish Safety and Reliability Association
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Minori stranieri non accompagnati: ordinamenti a confronto
Unaccompanied Children: comparing European legal systems
Autorzy:
Valente, Cinzia
Powiązania:
https://bibliotekanauki.pl/articles/1944511.pdf
Data publikacji:
2021-03-27
Wydawca:
Uniwersytet w Białymstoku. Wydawnictwo Uniwersytetu w Białymstoku
Tematy:
child
migration
law
Europe
critical points
Opis:
The contribution aims to illustrate the evolution of national and European legislation on the subject of the protection of unaccompanied minors; the effectiveness of the Italian discipline and the French one in a comparative perspective as well as the European strategy are the core of the analysis. The adoption of the Italian Law 7 Aprile 2017 n. 47, so called Zampa Law, represents an important step towards the recognition of a complete protection of migrant child in the national background; the study on the enforcement of the reform will allow the evaluation of the Italian legal system’s efficiency. On the other hand, I will analyze the remedies offered by the French system; in this context the regulation concerning children in civil code gets along with different legal source. Particular attention will be paid to the state of art in the European context looking for common rules or guidelines. The analysis of national and European results will be the objective of some conclusive remarks.
Źródło:
Miscellanea Historico-Iuridica; 2020, 19, 1; 289-315
1732-9132
2719-9991
Pojawia się w:
Miscellanea Historico-Iuridica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Continuous mappings with an infinite number of topologically critical points
Autorzy:
Pintea, Cornel
Powiązania:
https://bibliotekanauki.pl/articles/1294730.pdf
Data publikacji:
1997
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Tematy:
topologically critical points
covering mappings
G-manifolds
Opis:
We prove that the topological φ-category of a pair (M,N) of topological manifolds is infinite if the algebraic φ-category of the pair of fundamental groups (π₁(M),π₁(N)) is infinite. Some immediate consequences of this fact are also pointed out.
Źródło:
Annales Polonici Mathematici; 1997, 67, 1; 87-93
0066-2216
Pojawia się w:
Annales Polonici Mathematici
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Critical points of asymptotically quadratic functions
Autorzy:
Fečkan, Michal
Powiązania:
https://bibliotekanauki.pl/articles/1311563.pdf
Data publikacji:
1995
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Tematy:
critical points
Morse-Conley index
pseudomonotone mappings
Opis:
Existence results for critical points of asymptotically quadratic functions defined on Hilbert spaces are studied by using Morse-Conley index and pseudomonotone mappings. Applications to differential equations are given.
Źródło:
Annales Polonici Mathematici; 1995, 61, 1; 63-76
0066-2216
Pojawia się w:
Annales Polonici Mathematici
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Equivariant maps of joins of finite G-sets and an application to critical point theory
Autorzy:
Rozpłoch-Nowakowska, Danuta
Powiązania:
https://bibliotekanauki.pl/articles/1312198.pdf
Data publikacji:
1992
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Tematy:
join
group actions
Borsuk's Antipodal Theorem
critical points
Opis:
A lower estimate is proved for the number of critical orbits and critical values of a G-invariant C¹ function $f:S^n → ℝ$, where G is a finite nontrivial group acting freely and orthogonally on $ℝ^{n+1} \ {0}$. Neither Morse theory nor the minimax method is applied. The proofs are based on a general version of Borsuk's Antipodal Theorem for equivariant maps of joins of G-sets.
Źródło:
Annales Polonici Mathematici; 1991-1992, 56, 2; 195-211
0066-2216
Pojawia się w:
Annales Polonici Mathematici
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Kaplan classes of a certain family of functions
Autorzy:
Ignaciuk, Szymon
Parol, Maciej
Powiązania:
https://bibliotekanauki.pl/articles/1395919.pdf
Data publikacji:
2020
Wydawca:
Uniwersytet Marii Curie-Skłodowskiej. Wydawnictwo Uniwersytetu Marii Curie-Skłodowskiej
Tematy:
Kaplan classes
univalence
close-to-convex functions
critical points
Opis:
We give the complete characterization of members of Kaplan classes of products of power functions with all zeros symmetrically distributed in \(\mathbb{T} := \{z \in\mathbb{C} : |z| = 1\}\) and weakly monotonic sequence of powers. In this way we extend Sheil-Small’s theorem. We apply the obtained result to study univalence of antiderivative of these products of power functions.
Źródło:
Annales Universitatis Mariae Curie-Skłodowska, sectio A – Mathematica; 2020, 74, 2
0365-1029
2083-7402
Pojawia się w:
Annales Universitatis Mariae Curie-Skłodowska, sectio A – Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Neumann boundary value problem for a class of gradient systems
Autorzy:
Pan, W. W.
Li, L.
Powiązania:
https://bibliotekanauki.pl/articles/255138.pdf
Data publikacji:
2014
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
Neumann problems
weak solutions
critical points
(p1, . . . , pn)-Laplacian
Opis:
In this paper we study a class of two-point boundary value systems. Using very recent critical points theorems, we establish the existence of one non-trivial solution and infinitely many solutions of this problem, respectively.
Źródło:
Opuscula Mathematica; 2014, 34, 1; 171-181
1232-9274
2300-6919
Pojawia się w:
Opuscula Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modelling Tumour-Immunity Interactions With Different Stimulation Functions
Autorzy:
Zhivkov, P.
Waniewski, J.
Powiązania:
https://bibliotekanauki.pl/articles/908163.pdf
Data publikacji:
2003
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
medycyna
matematyka
ordinary differential equations
critical points
stability analysis
immunotherapy
Opis:
Tumour immunotherapy is aimed at the stimulation of the otherwise inactive immune system to remove, or at least to restrict, the growth of the original tumour and its metastases. The tumour-immune system interactions involve the stimulation of the immune response by tumour antigens, but also the tumour induced death of lymphocytes. A system of two non-linear ordinary differential equations was used to describe the dynamic process of interaction between the immune system and the tumour. Three different types of stimulation functions were considered: (a) Lotka-Volterra interactions, (b) switching functions dependent on the tumour size in the Michaelis-Menten form, and (c) Michaelis-Menten switching functions dependent on the ratio of the tumour size to the immune capacity. The linear analysis of equilibrium points yielded several different types of asymptotic behaviour of the system: unrestricted tumour growth, elimination of tumour or stabilization of the tumour size if the initial tumour size is relatively small, otherwise unrestricted tumour growth, global stabilization of the tumour size, and global elimination of the tumour. Models with switching functions dependent on the tumour size and the tumour to the immune capacity ratio exhibited qualitatively similar asymptotic behaviour.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2003, 13, 3; 307-315
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Periodic solutions of Euler-Lagrange equations with sublinear potentials in an Orlicz-Sobolev space setting
Autorzy:
Acinas, Sonia
Mazzone, Fernando
Powiązania:
https://bibliotekanauki.pl/articles/747300.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Marii Curie-Skłodowskiej. Wydawnictwo Uniwersytetu Marii Curie-Skłodowskiej
Tematy:
Periodic solution
Orlicz-Sobolev spaces
Euler-Lagrange
\(N\)-function
critical points
Opis:
In this paper, we obtain existence results of periodic solutions of hamiltonian systems in the Orlicz-Sobolev space \(W^1L^\Phi([0,T])\). We employ the direct method of calculus of variations and we consider  a potential  function \(F\) satisfying the inequality \(|\nabla F(t,x)|\leq b_1(t) \Phi_0'(|x|)+b_2(t)\), with \(b_1, b_2\in L^1\) and  certain \(N\)-functions \(\Phi_0\).
Źródło:
Annales Universitatis Mariae Curie-Skłodowska, sectio A – Mathematica; 2017, 71, 2
0365-1029
2083-7402
Pojawia się w:
Annales Universitatis Mariae Curie-Skłodowska, sectio A – Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Multiple solutions for fourth order elliptic problems with p(x)-biharmonic operators
Autorzy:
Kong, L.
Powiązania:
https://bibliotekanauki.pl/articles/254793.pdf
Data publikacji:
2016
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
critical points
p(x)-biharmonic operator
weak solutions
mountain pass lemma
Opis:
We study the multiplicity of weak solutions to the following fourth order nonlinear elliptic problem with a p(x)-biharmonic operator [formula] where Ω is a smooth bounded domain in RN, [formula] is the p(x)-biharmonic operator, and λ > 0 is a parameter. We establish sufficient conditions under which there exists a positive number λ* such that the above problem has at least two nontrivial weak solutions for each λ > λ*. Our analysis mainly relies on variational arguments based on the mountain pass lemma and some recent theory on the generalized Lebesgue-Sobolev spaces [formula].
Źródło:
Opuscula Mathematica; 2016, 36, 2; 253-264
1232-9274
2300-6919
Pojawia się w:
Opuscula Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Existence and multiplicity results for nonlinear problems involving the p(x)-laplace operator
Autorzy:
Tsouli, N.
Darhouche, O.
Powiązania:
https://bibliotekanauki.pl/articles/256023.pdf
Data publikacji:
2014
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
critical points
variational method
generalized Lebesgue-Sobolev spaces
p(x)-Laplacian
Opis:
In this paper we study the following nonlinear boundary-value problem [formula] where Ω ⊂ RN is a bounded domain with smooth boundary [formula] is the outer unit normal derivative on [formula] are two real numbers such that [formula] is a continuous function on Ω with [formula] are continuous functions. Under appropriate assumptions on ƒ and g, we obtain the existence and multiplicity of solutions using the variational method. The positive solution of the problem is also considered.
Źródło:
Opuscula Mathematica; 2014, 34, 3; 621-638
1232-9274
2300-6919
Pojawia się w:
Opuscula Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On the existence of three solutions for quasilinear elliptic problem
Autorzy:
Goncerz, P.
Powiązania:
https://bibliotekanauki.pl/articles/254869.pdf
Data publikacji:
2012
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
critical point
elliptic problem
minimax inequality
p-Laplacian
three critical points theorem
weak solution
Opis:
We consider a quasilinear elliptic problem of the type - Δpu = λ (ƒ (u)+ μg(u)) in Ω, u/∂Ω = 0, where Ω ⊂ RN is an open and bounded set, ƒ, g are continuous real functions on R and , λ, μ ∈ R. We prove the existence of at least three solutions for this problem using the so called three critical points theorem due to Ricceri.
Źródło:
Opuscula Mathematica; 2012, 32, 3; 473-486
1232-9274
2300-6919
Pojawia się w:
Opuscula Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Generalized Newton and NCP-methods: convergence, regularity, actions
Autorzy:
Kummer, Bernd
Powiązania:
https://bibliotekanauki.pl/articles/729371.pdf
Data publikacji:
2000
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
nonsmooth functions
generalized Newton methods
critical points
complementarity
SQP methods
inverse mappings
regularity
Opis:
Solutions of several problems can be modelled as solutions of nonsmooth equations. Then, Newton-type methods for solving such equations induce particular iteration steps (actions) and regularity requirements in the original problems. We study these actions and requirements for nonlinear complementarity problems (NCP's) and Karush-Kuhn-Tucker systems (KKT) of optimization models. We demonstrate their dependence on the applied Newton techniques and the corresponding reformulations. In this way, connections to SQP-methods, to penalty-barrier methods and to general properties of so-called NCP-functions are shown. Moreover, direct comparisons of the hypotheses and actions in terms of the original problems become possible. Besides, we point out the possibilities and bounds of such methods in dependence of smoothness.
Źródło:
Discussiones Mathematicae, Differential Inclusions, Control and Optimization; 2000, 20, 2; 209-244
1509-9407
Pojawia się w:
Discussiones Mathematicae, Differential Inclusions, Control and Optimization
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Existence of three solutions for impulsive multi-point boundary value problems
Autorzy:
Bohner, M.
Heidarkhani, S.
Salari, A.
Caristi, G.
Powiązania:
https://bibliotekanauki.pl/articles/255146.pdf
Data publikacji:
2017
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
multi-point boundary value problem
impulsive condition
classical solution
variational method
three critical points theorem
Opis:
This paper is devoted to the study of the existence of at least three classical solutions for a second-order multi-point boundary value problem with impulsive effects. We use variational methods for smooth functionals defined on reflexive Banach spaces in order to achieve our results. Also by presenting an example, we ensure the applicability of our results.
Źródło:
Opuscula Mathematica; 2017, 37, 3; 353-379
1232-9274
2300-6919
Pojawia się w:
Opuscula Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 19

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