Pełnotekstowe zasoby PLDML oraz innych baz dziedzinowych są już dostępne w nowej Bibliotece Nauki.
Zapraszamy na https://bibliotekanauki.pl
Preferencje help
Polish version English version Język
Widoczny [Schowaj] Abstrakt
Liczba wyników

Znaleziono wyników: 12

Liczba wyników na stronie
first rewind previous Strona / 1 next fast forward last

Wyniki wyszukiwania

help Sortuj według:

help Ogranicz wyniki do:
first rewind previous Strona / 1 next fast forward last
1
Content available remote

Schwartz spaces associated with some non-differential convolution operators on homogeneous groups

100%
Dziubański J.
Colloquium Mathematicum
|
1992
|
tom 63
|
nr 2
153-161
2
Content available remote

A note on Schrödinger operators with polynomial potentials

100%
Dziubański J.
Colloquium Mathematicum
|
1998
|
tom 78
|
nr 1
149-161
3
Content available remote

On semigroups generated by subelliptic operators on homogeneous groups

100%
Dziubański J.
Colloquium Mathematicum
|
1993
|
tom 64
|
nr 2
215-231
4
Content available remote

Hardy spaces H¹ for Schrödinger operators with certain potentials

64%
Dziubański J., Zienkiewicz J.
Studia Mathematica
|
2004
|
tom 164
|
nr 1
39-53
EN
Let ${K_{t}}_{t>0}$ be the semigroup of linear operators generated by a Schrödinger operator -L = Δ - V with V ≥ 0. We say that f belongs to $H¹_{L}$ if $||sup_{t>0} |K_{t}f(x)| ||_{L¹(dx)} < ∞$. We state conditions on V and $K_{t}$ which allow us to give an atomic characterization of the space $H¹_{L}$.
5
Content available remote

Smoothness of densities of semigroups of measures on homogeneous groups

64%
Dziubański J., Zienkiewicz J.
Colloquium Mathematicum
|
1993
|
tom 66
|
nr 2
227-242
6
Content available remote

Hardy spaces associated with some Schrödinger operators

64%
Dziubański J., Zienkiewicz J.
Studia Mathematica
|
1997
|
tom 126
|
nr 2
149-160
EN
For a Schrödinger operator A = -Δ + V, where V is a nonnegative polynomial, we define a Hardy $H_A^1$ space associated with A. An atomic characterization of $H_A^1$ is shown.
7
Content available remote

$H^{p}$ spaces associated with Schrödinger operators with potentials from reverse Hölder classes

64%
Dziubański J., Zienkiewicz J.
Colloquium Mathematicum
|
2003
|
tom 98
|
nr 1
5-38
EN
Let A = -Δ + V be a Schrödinger operator on $ℝ^{d}$, d ≥ 3, where V is a nonnegative potential satisfying the reverse Hölder inequality with an exponent q > d/2. We say that f is an element of $H^{p}_{A}$ if the maximal function $sup_{t>0} |T_{t}f(x)|$ belongs to $L^{p}(ℝ^{d})$, where ${T_{t}}_{t>0}$ is the semigroup generated by -A. It is proved that for d/(d+1) < p ≤ 1 the space $H^{p}_{A}$ admits a special atomic decomposition.
8
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

A remark on a Marcinkiewicz-Hörmander multiplier theorem for some non-differential convolution operators

63%
Dziubański J.
Colloquium Mathematicum
|
1989-1990
|
tom 58
|
nr 1
77-83
9
Content available remote

Note on semigroups generated by positive Rockland operators on graded homogeneous groups

52%
Dziubański J., Hebisch W., Zienkiewicz J.
Studia Mathematica
|
1994
|
tom 110
|
nr 2
115-126
EN
Let L be a positive Rockland operator of homogeneous degree d on a graded homogeneous group G and let $p_t$ be the convolution kernels of the semigroup generated by L. We prove that if τ(x) is a Riemannian distance of x from the unit element, then there are constants c>0 and C such that $|p_1(x)| ≤ Cexp(-cτ(x)^{d/(d-1)})$. Moreover, if G is not stratified, more precise estimates of $p_1$ at infinity are given.
10
Content available remote

Pluriharmonic functions on symmetric tube domains with BMO boundary values

52%
Damek E., Dziubański J., Hulanicki A., Torrea J.
Colloquium Mathematicum
|
2002
|
tom 94
|
nr 1
67-86
EN
Let 𝓓 be a symmetric Siegel domain of tube type and S be a solvable Lie group acting simply transitively on 𝓓. Assume that L is a real S-invariant second order operator that satisfies Hörmander's condition and annihilates holomorphic functions. Let H be the Laplace-Beltrami operator for the product of upper half planes imbedded in 𝓓. We prove that if F is an L-Poisson integral of a BMO function and HF = 0 then F is pluriharmonic. Some other related results are also considered.
11
Content available remote

A nilpotent Lie algebra and eigenvalue estimates

52%
Dziubański J., Hulanicki A., Jenkins J.
Colloquium Mathematicum
|
1995
|
tom 68
|
nr 1
7-16
EN
The aim of this paper is to demonstrate how a fairly simple nilpotent Lie algebra can be used as a tool to study differential operators on $ℝ^n$ with polynomial coefficients, especially when the property studied depends only on the degree of the polynomials involved and/or the number of variables.
12
Content available remote

On semigroups generated by left-invariant positive differential operators on nilpotent Lie groups

51%
Dziubański J., Hulanicki A.
Studia Mathematica
|
1989
|
tom 94
|
nr 1
81-95
first rewind previous Strona / 1 next fast forward last
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.