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Wyszukujesz frazę "invariant" wg kryterium: Temat


Wyświetlanie 1-12 z 12
Tytuł:
Some constructions of Lyapunov function for linear extensions of dynamical systems
Autorzy:
Kulik, V.
Tkocz-Piszczek, E.
Powiązania:
https://bibliotekanauki.pl/articles/255758.pdf
Data publikacji:
2011
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
Lyapunov function
invariant manifold
invariant torus
Opis:
In this note we consider some sets of linear extensions of dynamical systems and research regularity by means of the sign-changing Lyapunov function. We examine some constructions of Lyapunov functions for given systems.
Źródło:
Opuscula Mathematica; 2011, 31, 3; 399-409
1232-9274
2300-6919
Pojawia się w:
Opuscula Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Shifted model spaces and their orthogonal decompositions
Autorzy:
Câmara, M. Cristina
Kliś-Garlicka, Kamila
Ptak, Marek
Powiązania:
https://bibliotekanauki.pl/articles/29519749.pdf
Data publikacji:
2024
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
model space
Toeplitz operator
Toeplitz kernel
truncated Toeplitz operator
nearly invariant
shift invariant
Opis:
We generalize certain well known orthogonal decompositions of model spaces and obtain similar decompositions for the wider class of shifted model spaces, allowing us to establish conditions for near invariance of the latter with respect to certain operators which include, as a particular case, the backward shift S*. In doing so, we illustrate the usefulness of obtaining appropriate decompositions and, in connection with this, we prove some results on model spaces which are of independent interest. We show moreover how the invariance properties of the kernel of an operator T, with respect to another operator, follow from certain commutation relations between the two operators involved.
Źródło:
Opuscula Mathematica; 2024, 44, 3; 341-357
1232-9274
2300-6919
Pojawia się w:
Opuscula Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A note on invariant measures
Autorzy:
Niemiec, P.
Powiązania:
https://bibliotekanauki.pl/articles/255767.pdf
Data publikacji:
2011
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
invariant measures
equicontinuous semigroups
compact spaces
Opis:
The aim of the paper is to show that if F is a family of continuous transformations of a nonempty compact Hausdorff space Ω, then there is no F-invariant probabilistic regular Borel measures on Ω iff there are φ1..., φp ∈ F (for some p ≥ 2) and a continuous function u: Ω, p ? R such that Σ σ ∈Spu(x&sigma(1),...,x&sigmap = 0 and lim infn?∞1/n Σ n-1/k=0 (u o Φk)9x1,...xp) ≥ 1 for each x1,...xp ∈ Ω, where Φ: Ωp ∋ (x1,...xp) ? (φ1(x1,..., φp(xp)∈ Ωp and Φk is the k-th iterate of Φ. A modified version of this result in case the family F generates an equicontinuous semigroup is proved.
Źródło:
Opuscula Mathematica; 2011, 31, 3; 425-431
1232-9274
2300-6919
Pojawia się w:
Opuscula Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sign-changing Lyapunov functions in regularity of linear extensions of dynamical systems on a torus
Autorzy:
Tkocz-Piszczek, E.
Powiązania:
https://bibliotekanauki.pl/articles/255119.pdf
Data publikacji:
2008
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
invariant torus
Green's function of a problem of invariant toruses
regularity of linear extensions of dynamical systems
Opis:
In this paper we consider some sign-changing Lyapunov function in research on regularity of sets of linear extensions of dynamical systems on a torus.
Źródło:
Opuscula Mathematica; 2008, 28, 1; 93-101
1232-9274
2300-6919
Pojawia się w:
Opuscula Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Remarks on damped Schrodinger equation of Choquard type
Autorzy:
Chergui, Lassaad
Powiązania:
https://bibliotekanauki.pl/articles/2050906.pdf
Data publikacji:
2021
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
damped Choquard equation
global existence
scattering
invariant sets
Opis:
This paper is devoted to the Schrodinger-Choquard equation with linear damping. Global existence and scattering are proved depending on the size of the damping coefficient.
Źródło:
Opuscula Mathematica; 2021, 41, 4; 465-488
1232-9274
2300-6919
Pojawia się w:
Opuscula Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Monodromy invariant Hermitian forms for second order Fuchsian differential equations with four singularities
Autorzy:
Adachi, Shunya
Powiązania:
https://bibliotekanauki.pl/articles/2216189.pdf
Data publikacji:
2022
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
Fuchsian differential equations
monodromy representation
monodromy invariant Hermitian form
Opis:
We study the monodromy invariant Hermitian forms for second order Fuchsian differential equations with four singularities. The moduli space of our monodromy representations can be realized by certain affine cubic surface. In this paper we characterize the irreducible monodromies having the non-degenerate invariant Hermitian forms in terms of that cubic surface. The explicit forms of invariant Hermitian forms are also given. Our result may bring a new insight into the study of the Painlevé differential equations.
Źródło:
Opuscula Mathematica; 2022, 42, 3; 361-391
1232-9274
2300-6919
Pojawia się w:
Opuscula Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Quadratic inequalities for functionals in $l^{\infty}$
Autorzy:
Herzog, Gerd
Kunstmann, Peer Chr.
Powiązania:
https://bibliotekanauki.pl/articles/2051918.pdf
Data publikacji:
2021
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
Banach algebras of bounded functions
operator-invariant functionals
Banach limits
Opis:
For a class of operators $T$ on $l^{\infty}$ and $T$-invariant functionals $\phi$ we prove inequalities between $\phi(x), \phi(x^{2})$ and the upper density of the sets \[P_{r} := \{n \in \mathbb{N}_{0} : \phi((T^{n}x)\cdot x) > r\}\] Applications are given to Banach limits and integrals.
Źródło:
Opuscula Mathematica; 2021, 41, 3; 437-446
1232-9274
2300-6919
Pojawia się w:
Opuscula Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On the property of the BBGKY hierarchy solution in a cumulant representation
Autorzy:
Stashenko, M. O.
Hubal, H. M.
Powiązania:
https://bibliotekanauki.pl/articles/255280.pdf
Data publikacji:
2009
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
BBGKY hierarchy of equations
nonsymmetric system
cumulant (semi-invariant)
equilibrium distribution functions
Opis:
We consider a one-dimensional nonsymmetric system of particles interacting via the hard-core potential. For this system, we prove that the BBGKY hierarchy solution in a cumulant representation is an equilibrium in the case of equilibrium initial data.
Źródło:
Opuscula Mathematica; 2009, 29, 2; 209-216
1232-9274
2300-6919
Pojawia się w:
Opuscula Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On the structure of certain nontransitive diffeomorphism groups on open manifolds
Autorzy:
Kowalik, A.
Lech, J.
Michalik, I.
Powiązania:
https://bibliotekanauki.pl/articles/254822.pdf
Data publikacji:
2012
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
foliated manifold
bounded group
conjugation-invariant norm
group of diffeomorphisms
commutator
perfectness
uniform perfectness
Opis:
It is shown that in some generic cases the identity component of the group of leaf preserving diffeomorphisms (with not necessarily compact support) on a foliated open manifold is perfect. Next, it is proved that it is also bounded, i.e. bounded with respect to any bi-invariant metric. It follows that the group is uniformly perfect as well.
Źródło:
Opuscula Mathematica; 2012, 32, 3; 511-520
1232-9274
2300-6919
Pojawia się w:
Opuscula Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The work of professor Andrzej Lasota on asymptotic stability and recent progress
Autorzy:
Bartoszek, W.
Powiązania:
https://bibliotekanauki.pl/articles/255311.pdf
Data publikacji:
2008
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
invariant measure
asymptotic stability
asymptotic periodicity
compact attractor
lower function
smoothing
cell cycle
sweeping
genericity
Opis:
The paper is devoted to Professor Andrzej Lasota's contribution to the ergodic theory of stochastic operators. We have selected some of his important papers and shown their influence on the evolution of this topic. We emphasize the role A. Lasota played in promoting abstract mathematical theories by showing their applications. The article is focused exclusively on ergodic properties of discrete stochastic semigroups {Pn : n ≥ 0}. Nevertheless, almost all of Lasota's results presented here have their one-parameter continuous semigroup analogs.
Źródło:
Opuscula Mathematica; 2008, 28, 4; 395-413
1232-9274
2300-6919
Pojawia się w:
Opuscula Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Global existence and blow-up phenomenon for a quasilinear viscoelastic equation with strong damping and source terms
Autorzy:
Di, Huafei
Song, Zefang
Powiązania:
https://bibliotekanauki.pl/articles/2048895.pdf
Data publikacji:
2022
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
viscoelastic equation
strong damping and source
blow-up
upper and lower bound
potential well
invariant set
Opis:
Considered herein is the global existence and non-global existence of the initial-boundary value problem for a quasilinear viscoelastic equation with strong damping and source terms. Firstly, we introduce a family of potential wells and give the invariance of some sets, which are essential to derive the main results. Secondly, we establish the existence of global weak solutions under the low initial energy and critical initial energy by the combination of the Galerkin approximation and improved potential well method involving with t. Thirdly, we obtain the finite time blow-up result for certain solutions with the non-positive initial energy and positive initial energy, and then give the upper bound for the blow-up time $T\text{}^{∗}$. Especially, the threshold result between global existence and non-global existence is given under some certain conditions. Finally, a lower bound for the life span $T\text{}^{∗}$ is derived by the means of integro-differential inequality techniques.
Źródło:
Opuscula Mathematica; 2022, 42, 2; 119-155
1232-9274
2300-6919
Pojawia się w:
Opuscula Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Invariant measures whose supports possess the strong open set property
Autorzy:
Goodman, G. S.
Powiązania:
https://bibliotekanauki.pl/articles/1397779.pdf
Data publikacji:
2008
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
core
fractal
fractal measure
invariant measure
scaling function
scaling operator
strong open set condition
zero-one law
Opis:
Let X be a complete metric space, and S the union of a finite number of strict contractions on it. If P is a probability distribution on the maps, and K is the fractal determined by S, there is a unique Borel probability measure $ \mu_P$ on X which is invariant under the associated Markov operator, and its support is K. The Open Set Condition (OSC) requires that a non-empty, subinvariant, bounded open set $ V \subset X$ exists whose images under the maps are disjoint; it is strong if $ K \cup V \ne 0 $.In that case, the core of $ V, \check{V} = \bigcap_{n=0}^\infty $ is non-empty and dense in K. Moreover, when X is separable, $\check{V}$ has full $\mu_p$-measure for every P. We show that the strong condition holds for V satisfying the OSC iff $\mu_P(\delta V) = 0 $, and we prove a zero-one law for it. We characterize the complement of V relative to K, and we establish that the values taken by invariant measures on cylinder sets defined by K, or by the closure of V, form multiplicative cascades.
Źródło:
Opuscula Mathematica; 2008, 28, 4; 471-480
1232-9274
2300-6919
Pojawia się w:
Opuscula Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-12 z 12

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