Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

Wyszukujesz frazę "differentiability" wg kryterium: Temat


Tytuł:
A review: differential transform method for semi-analytical solution of differential equations
Autorzy:
Rashidi, M. M.
Rabiei, F.
Naser Nia, S.
Abbasbandy, S.
Powiązania:
https://bibliotekanauki.pl/articles/265637.pdf
Data publikacji:
2020
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
metoda transformacji różniczkowej
równania różniczkowe
metoda półanalityczna
differential transform method
differential transform - Pad'e approximation
semi-analytical method
differential equations
fuzzy differential transformation method
gS-differentiability
Opis:
In this article, the semi-analytical method known as the Differential Transform Method (DTM) for solving different types of differential equations is reviewed. First, basic definitions and formulas of DTM and Differential Transform-Padé approximation (DTM-Padé), which are used to increase the convergence and accuracy of DTM approximations, are discussed. Then both techniques of DTM and DTM-Padé, which have been successfully applied to partial differential equations, as well as the application of these methods in fluid mechanic and heat transfer are presented. In addition, the extension of DTM for integral differential equations and the fuzzy differential transformation method (FDTM) for fuzzy problems are discussed.
Źródło:
International Journal of Applied Mechanics and Engineering; 2020, 25, 2; 122-129
1734-4492
2353-9003
Pojawia się w:
International Journal of Applied Mechanics and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optimal heat distributions by a gradient-based shape optimization method
Autorzy:
Belhachmi, Z.
Meftahi, B.
Meftahi, H.
Powiązania:
https://bibliotekanauki.pl/articles/206300.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
heat conduction
shape optimization
sensitivity analysis
minimax differentiability
Opis:
In this paper, we consider the problem of locating coated inclusions in a 2D dimensional conductor material in order to obtain a suitable thermal environment. The mathematical model is described by elliptic partial differential equation with linear boundary condition, including heat transfer coefficient. A shape optimization problem is formulated by introducing a cost functional to solve the problem under consideration. The shape sensitivity analysis is rigorously performed for the problem by means of a Lagrangian formulation. The optimization problem is solved by means of gradient-based strategy and numerical experiments are carried out to demonstrate the feasibility of the approach.
Źródło:
Control and Cybernetics; 2018, 47, 1; 33-53
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Robust estimation in the multivariate normal model
Autorzy:
Kulawik, Agnieszka
Zontek, Stefan
Powiązania:
https://bibliotekanauki.pl/articles/729726.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
asymptotic normality
Fisher consistency
Fréchet differentiability
multivariate normal model
statistical functional
Opis:
Robust estimation presented in the following paper is based on Fisher consistent and Fréchet differentiable statistical functionals. The method has been used in the multivariate normal model with variance components [5]. To transfer the method to estimate vector of expectations and positive definite covariance matrix of the multivariate normal model it is required to express the covariance matrix as a linear combination of basic elements of the vector space of real, square and symmetric matrices. The theoretical results have been completed with computer simulation studies. The robust estimator has been investigated both for model and contaminated data. Comparison with the maximum likelihood estimator has also been included.
Źródło:
Discussiones Mathematicae Probability and Statistics; 2016, 36, 1-2; 53-66
1509-9423
Pojawia się w:
Discussiones Mathematicae Probability and Statistics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On the quasilinear Cauchy problem for a hyperbolic functional differential equation
Autorzy:
Puźniakowska-Gałuch, E.
Powiązania:
https://bibliotekanauki.pl/articles/254975.pdf
Data publikacji:
2015
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
functional differential equations
Haar pyramid
differentiability of solutions
Fredholm type of equation
Opis:
The Cauchy problem for hyperbolic functional differential equations is considered. Volterra and Fredholm dependence are considered. A theorem on the local existence of generalized solutions defined on the Haar pyramid is proved. A result on differentiability of a solution with respect to initial data is proved.
Źródło:
Opuscula Mathematica; 2015, 35, 6; 915-933
1232-9274
2300-6919
Pojawia się w:
Opuscula Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
About differentiability and V BG * class
Autorzy:
Turowska, M.
Powiązania:
https://bibliotekanauki.pl/articles/122067.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Humanistyczno-Przyrodniczy im. Jana Długosza w Częstochowie. Wydawnictwo Uczelniane
Tematy:
różniczkowalność
przestrzeń Banacha
funkcje różniczkowalne
funkcje rzeczywiste
differentiability
Banach space
differentiable functions
real functions
Opis:
Let X be a finite dimensional real Banach space. We show that if the contingent of the curve Γ : (a, b) → X fulfils some conditions then each parametrization of that curve is V BG * . Stanisław Saks proved that each V BG * function is differentiable at a set of full Lebesgue measure. The result of this paper is a partial converse of that theorem.
Źródło:
Scientific Issues of Jan Długosz University in Częstochowa. Mathematics; 2014, 19; 245-249
2450-9302
Pojawia się w:
Scientific Issues of Jan Długosz University in Częstochowa. Mathematics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Existence and regularity of solutions for hyperbolic functional differential problems
Autorzy:
Kamont, Z.
Powiązania:
https://bibliotekanauki.pl/articles/255366.pdf
Data publikacji:
2014
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
functional differential equations
weak solutions
Haar pyramid
differentiability with respect to initial functions
Opis:
A generalized Cauchy problem for quasilinear hyperbolic functional differential systems is considered. A theorem on the local existence of weak solutions is proved. The initial problem is transformed into a system of functional integral equations for an unknown function and for their partial derivatives with respect to spatial variables. The existence of solutions for this system is proved by using a method of successive approximations. We show a theorem on the differentiability of solutions with respect to initial functions which is the main result of the paper.
Źródło:
Opuscula Mathematica; 2014, 34, 2; 217-242
1232-9274
2300-6919
Pojawia się w:
Opuscula Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On /()X\)-convex functions
Autorzy:
Rolewicz, Stefan
Powiązania:
https://bibliotekanauki.pl/articles/744941.pdf
Data publikacji:
2013
Wydawca:
Polskie Towarzystwo Matematyczne
Tematy:
\(X\)-convex functions, Frechet differentiability
Opis:
Let \(X\) be a Banach space. Let \(f(\cdot)\) be a real valued function defined on an open convex set \(\Omega \subset X^*\), where \(X^*\) as usual denote the conjugate space. We say that the function \(f(\cdot)\) is \(X$\)convex, if there is a set \(\Phi_f \subset X\) such that $$ f(x^*)= sup_{x \in \Phi_f, r \in \R} x^*(x)+r. \eqno{(1)}$$ In the paper it will be shown that if \(X\) is separable, then the function \(f(\cdot)\) is Frechet differentiable on a dense \(G_{\delta}\) set.
Źródło:
Commentationes Mathematicae; 2013, 53, 2
0373-8299
Pojawia się w:
Commentationes Mathematicae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Φ- α(⋅)-K-monotone multifunctions with values in ordered Banach space with increasing norm
Autorzy:
Rolewicz, S.
Powiązania:
https://bibliotekanauki.pl/articles/206769.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
vector valued functions
normal cone
cone with bounded basis
Φ-α(⋅)-K-subgradi-ents
increasing norm
Φ-α(⋅)-k-subdifferential Fréchet Φ-differentiability
Opis:
Let (X, d) be a metric space. Let Y be an ordered Banach space with increasing norm. Let Φ be a separable linear family (a class) of Lipschitz functions defined on X and with values in Y . Let α(⋅) be a nondecreasing function mapping the interwal [0,+∞) into itself such that limt↓0 α(t) / t = 0. We say that a multifunction mapping X into Φ is Φ -α(⋅)-K-monotone if for all k in the interior of K, k ∈ Int K, there is a constant Ck > 0 such that for all φx ∈Γ (x),φy ∈Γ (y) we have φx(x) + φy(y) − φx(y) − φy(x) ≥K −Ckα(d(x, y))k.It is shown in the paper that under certain conditions on each Φ - Φα(⋅)-K-monotone multifunction is single-valued and continuous on a dense G δ-set..
Źródło:
Control and Cybernetics; 2013, 42, 4; 793-803
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On uniformly approximate convex vector-valued function
Autorzy:
Rolewicz, S.
Powiązania:
https://bibliotekanauki.pl/articles/206344.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
vector valued functions
strongly α(·)-K-paraconvexity
differentiable manifolds
Gateaux and Frechet differentiability
Opis:
Let X, Y be real Banach spaces. Let Z be a Banach space partially ordered by a pointed closed convex cone K. Let f(·) be a locally uniformly approximate convex function mapping an open subset ΩY ⊂ Y into Z. Let ΩX ⊂ X be an open subset. Let σ(·) be a differentiable mapping of ΩX into ΩY such that the differentials of σ/x are locally uniformly continuous function of x. Then f(σ(·)) mapping X into Z is also a locally uniformly approximate convex function. Therefore, in the case of Z = Rn the composed function f(σ(·)) is Frechet differentiable on a dense Gδ-set, provided X is an Asplund space, and Gateaux differentiable on a dense Gδ-set, provided X is separable. As a consequence, we obtain that in the case of Z = Rn a locally uniformly approximate convex function defined on a C1,uE -manifold is Frechet differentiable on a dense Gδ-set, provided E is an Asplund space, and Gateaux differentiable on a dense Gδ-set, provided E is separable.
Źródło:
Control and Cybernetics; 2012, 41, 2; 443-462
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On a theorem of Lindelof
Autorzy:
Gutlyanskii, Vladimir Ya.
Martio, Olli
Ryazanov, Vladimir
Powiązania:
https://bibliotekanauki.pl/articles/747116.pdf
Data publikacji:
2011
Wydawca:
Uniwersytet Marii Curie-Skłodowskiej. Wydawnictwo Uniwersytetu Marii Curie-Skłodowskiej
Tematy:
Lindelof theorem
infinitesimal geometry
continuous extension to the boundary
differentiability at the boundary
conformal and quaisconformal mappings
Opis:
We give a quasiconformal version of the proof for the classical Lindelof theorem: Let \(f\) map the unit disk \(\mathbb{D}\) conformally onto the inner domain of a Jordan curve \(\mathcal{C}\): Then \(\mathcal{C}\) is smooth if and only if arg \(f'(z)\) has a continuous extension to \(\overline{\mathbb{D}}\). Our proof does not use the Poisson integral representation of harmonic functions in the unit disk.
Źródło:
Annales Universitatis Mariae Curie-Skłodowska, sectio A – Mathematica; 2011, 65, 2
0365-1029
2083-7402
Pojawia się w:
Annales Universitatis Mariae Curie-Skłodowska, sectio A – Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
How to define "convex functions" on differentiable manifolds
Autorzy:
Rolewicz, Stefan
Powiązania:
https://bibliotekanauki.pl/articles/729398.pdf
Data publikacji:
2009
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
Fréchet differetiability
Gateaux differentiability
locally strongly paraconvex functions
$C^{1,u}$-manifolds
Opis:
In the paper a class of families (M) of functions defined on differentiable manifolds M with the following properties:
$1_{}$. if M is a linear manifold, then (M) contains convex functions,
$2_{}$. (·) is invariant under diffeomorphisms,
$3_{}$. each f ∈ (M) is differentiable on a dense $G_{δ}$-set,
is investigated.
Źródło:
Discussiones Mathematicae, Differential Inclusions, Control and Optimization; 2009, 29, 1; 7-17
1509-9407
Pojawia się w:
Discussiones Mathematicae, Differential Inclusions, Control and Optimization
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Towards historical roots of necessary conditions of optimality: Regula of Peano
Autorzy:
Dolecki, S.
Greco, G. H.
Powiązania:
https://bibliotekanauki.pl/articles/970285.pdf
Data publikacji:
2007
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
różniczkowalność
zbiór wypukły
differentiability
convex set
Kuratowski limit of sets
tangent cones
condition of optimality
mean value theorem
Peano remainder
Peano's regula
strict derivability
Peano's Formulario Mathematico
Peano's Geometric Calculus
Grassmann's Ausdehnungslehre
Opis:
At the end of 19th century Peano discerned vector spaces, differentiability, convex sets, limits of families of sets, tangent cones, and many other concepts, in a modern perfect form. He applied these notions to solve numerous problems. The theorem on necessary conditions of optimality (Regula) is one of these. The formal language of logic that he developed, enabled him to perceive mathematics with great precision and depth. Actually he built mathematics axiomatically based exclusively on logical and set-theoretic primitive terms and properties, which was a revolutionary turning point in the development of mathematics.
Źródło:
Control and Cybernetics; 2007, 36, 3; 491-518
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Inversion of multifunctions and differential inclusions
Autorzy:
Nachi, K.
Penot, J.-P.
Powiązania:
https://bibliotekanauki.pl/articles/970557.pdf
Data publikacji:
2005
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
pochodna
różniczkowalność
inkluzja różniczkowa
odwzorowanie odwrotne
funkcja uwikłana
klasa multifunkcji
derivative
differentiability
differential inclusion
multimapping
inverse mapping
implicit function
set-valued mapping
Opis:
We present a new inverse mapping theorem for correspondences. It uses a notion of differentiability for multifunctions which seems to be new. We compare it with previous versions. We provide an application to differential inclusions.
Źródło:
Control and Cybernetics; 2005, 34, 3; 871-901
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Paraconvex analysis
Autorzy:
Rolewicz, S.
Powiązania:
https://bibliotekanauki.pl/articles/970560.pdf
Data publikacji:
2005
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
funkcja parawypukła
różniczkowalność Frecheta
alpha(.)-paraconvex functions
Frechet differentiability
Opis:
In the theory of optimization an essential role is played by the differentiability of convex functions. In this paper we shall try to extend the results concerning differentiability to a larger class of functions called strongly alpha(.)-paraconvex. Let (X, (|.||) be a real Banach space. Let f(x) be a real valued strongly alpha(.)-paraconvex function denned on an open convex subset Omega [is a subset is] X, i.e. f(tx+(1-t)y)
Źródło:
Control and Cybernetics; 2005, 34, 3; 951-965
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On alpha(.)-monotone multifunctions and differentiability of strongly alpha(.)-paraconvex functions
Autorzy:
Rolewicz, S.
Powiązania:
https://bibliotekanauki.pl/articles/206523.pdf
Data publikacji:
2002
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
Fi-różniczkowalność Frecheta
funkcja silnie parawypukła
wielofunkcja alfa(.)-monotoniczna
alpha(.)-monotone multifunctions
Frechet [Phi]-differentiability
strongly paraconvex functions
Opis:
Let (X, d) be a metric space. Let [Phi] be a family of real-valued functions defined on X. The paper provides the suf ficient conditions, warranting that on alpha(.)-monotone multifunction [Gamma : X --> 2^Phi] is single-valued and continuous on a weakly angle-small set. As an application it is shown that a strongly alpha(.)-paraconvex (i.e. uniformly approximate convex) function defined on an open convex subset of a Banach space having separable dual is Frechet differentiable on a residual set.
Źródło:
Control and Cybernetics; 2002, 31, 3; 601-619
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł

Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies