Zobrazeno 1 - 10
of 622
pro vyhledávání: '"Dilation (operator theory)"'
Autor:
Malte Litsgård, Kaj Nyström
Publikováno v:
Journal de Mathématiques Pures et Appliquées. 157:45-100
In this paper we develop a potential theory for strongly degenerate parabolic operators of the form L : = ∇ X ⋅ ( A ( X , Y , t ) ∇ X ) + X ⋅ ∇ Y − ∂ t , in unbounded domains of the form Ω = { ( X , Y , t ) = ( x , x m , y , y m , t )
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::18910ff5018acf770ffd403f9a843f4b
https://doi.org/10.1016/j.matpur.2021.11.004
https://doi.org/10.1016/j.matpur.2021.11.004
Autor:
Kenta Kojin
Publikováno v:
Canadian Mathematical Bulletin. 66:218-224
This short note refines a noncommutative (nc) Oka–Weil theorem by using a characterization of free compact nc sets based on the notion of dilation hulls. A consequence of it is that any free holomorphic function can be represented as a free polynom
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6d871d52f9f73e0480232dddb0f968f4
https://doi.org/10.4153/s0008439521000916
https://doi.org/10.4153/s0008439521000916
Autor:
Jarosław Mederski
Publikováno v:
Journal of Differential Equations. 281:411-441
We find a class of optimal Sobolev inequalities ( ∫ R N | ∇ u | 2 d x ) N N − 2 ≥ C N , G ∫ R N G ( u ) d x , u ∈ D 1 , 2 ( R N ) , N ≥ 3 , where the nonlinear function G : R → R of class C 1 satisfies general growth assumptions in th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::166ead67da48c14b3ac7555b90b5163b
https://doi.org/10.1016/j.jde.2021.02.015
https://doi.org/10.1016/j.jde.2021.02.015
Autor:
Bilender P. Allahverdiev, Hüseyin Tuna
Publikováno v:
Ukrainian Mathematical Journal. 72:671-689
We consider symmetric Dirac operators on bounded time scales. Under general boundary conditions, we describe extensions (dissipative, accumulative, self-adjoint, etc.) of these symmetric operators. We construct a self-adjoint dilation of the dissipat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c95159eaeabef7ada74785fb1c860634
https://doi.org/10.1007/s11253-020-01808-8
https://doi.org/10.1007/s11253-020-01808-8
Publikováno v:
Indagationes Mathematicae. 31:885-892
We study two subclasses of Banach limits: the one consisting of Banach limits which are invariant with respect of the Ces\`aro operator and another one consists of Banach limits which are invariant with respect to all dilations. We prove that the fir
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::089c6c9c3f3d413483608ca7678d8e5a
https://doi.org/10.1016/j.indag.2019.12.003
https://doi.org/10.1016/j.indag.2019.12.003
Publikováno v:
Chinese Annals of Mathematics, Series B. 41:585-600
Inspired by some recent development on the theory about projection valued dilations for operator valued measures or more generally bounded homomorphism dilations for bounded linear maps on Banach algebras, the authors explore a pure algebraic version
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8672cd95a8a05afb850a62520632c4b1
https://doi.org/10.1007/s11401-020-0219-4
https://doi.org/10.1007/s11401-020-0219-4
Autor:
Stefania A. M. Marcantognini
Publikováno v:
Revista de la Unión Matemática Argentina. :145-160
The infinitesimal generator A of a strongly continuous semigroup on a Hilbert space is assumed to satisfy that Bβ := A−β is a sectorial operator of angle less than π 2 for some β ≥ 0. If Bβ is dissipative in some equivalent scalar product th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::500f8c239c00de4fa0e6158d48079cc5
https://doi.org/10.33044/revuma.v61n1a09
https://doi.org/10.33044/revuma.v61n1a09
Autor:
Yun-Zhang Li, Wei Zhang
Publikováno v:
Science China Mathematics. 63:2423-2438
Wavelet and Gabor systems are based on translation-and-dilation and translation-and-modulation operators, respectively, and have been studied extensively. However, dilation-and-modulation systems cannot be derived from wavelet or Gabor systems. This
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5ed0bab4293565bde12135f295cafb82
https://doi.org/10.1007/s11425-018-9468-8
https://doi.org/10.1007/s11425-018-9468-8
Autor:
Pengtong Li, Liang Li
Publikováno v:
Indian Journal of Pure and Applied Mathematics. 51:589-610
In this paper, we study the dilation of g-frame generators and the dual g-frame generators for an abstract wavelet system. By the semi-orthogonality of a special unitary system, we prove the dual g-frame generators can be dilated to a pair of dual g-
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::96802554b77996c778720206dd509e27
https://doi.org/10.1007/s13226-020-0419-3
https://doi.org/10.1007/s13226-020-0419-3
Autor:
Ruslan Salimov, Mariia V. Stefanchuk
Publikováno v:
Journal of Mathematical Sciences. 248:203-216
A power estimate of the area of the image of a disk for regular homeomorphisms possessing the Luzin N-property is obtained in terms of the p-angular dilation for p > 2. The result generalizes the known estimate by M.A. Lavrent’ev. A number of theor
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6d1838c3494b9f7ea8bea93e938f14a4
https://doi.org/10.1007/s10958-020-04870-6
https://doi.org/10.1007/s10958-020-04870-6