Zobrazeno 1 - 10
of 45
pro vyhledávání: '"Leonhard Frerick"'
Publikováno v:
Ergodic Theory and Dynamical Systems. 42:1-8
For arbitrary closed countable subsets Z of the unit circle examples of topologically mixing operators on Hilbert spaces are given which have a densely spanning set of eigenvectors with unimodular eigenvalues restricted to Z. In particular, these ope
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cddb8b591601c165201f0c4895e8d5af
https://doi.org/10.1017/etds.2020.135
https://doi.org/10.1017/etds.2020.135
Publikováno v:
SSRN Electronic Journal.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::819364309dcc3ae01b943ee3ace6566a
https://doi.org/10.2139/ssrn.4115406
https://doi.org/10.2139/ssrn.4115406
Publikováno v:
Complex Analysis and Operator Theory. 15
Every semigroup $$\{\varphi _t\}_{t\ge 0}$$ of self-maps of the disc defines a semigroup $$\{C_{\varphi _t}\}_{t\ge 0}$$ of compositions operators on the space of holomorphic functions on the disc. We characterize the (uniform) mean ergodicity (in th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::89c739017be0f28b60e66bd5ee6bf1ed
https://doi.org/10.1007/s11785-021-01105-7
https://doi.org/10.1007/s11785-021-01105-7
Publikováno v:
Results in Mathematics. 75
We consider the space of real-valued continuously differentiable functions on a compact subset of a euclidean space. We characterize the completeness of this space and prove that the space of restrictions of continuously differentiable functions on t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f4e0ea1638d803efc0cd6a3c3b27d121
https://doi.org/10.1007/s00025-020-01303-3
https://doi.org/10.1007/s00025-020-01303-3
Publikováno v:
RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia
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We introduce sufficient as well as necessary conditions for a compact set $K$ such that there is a continuous linear extension operator from the space of restrictions $C^\infty(K)=\lbrace F|_K: F\in C^\infty(\mathbb R)\rbrace$ to $C^\infty(\mathbb R)
Externí odkaz:
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Publikováno v:
Studia Mathematica. :1-10
The diametral dimension is an important topological invariant in the category of Frechet spaces which has been used, e.g., to distinguish types of Stein manifolds. We introduce variants of the classical definition in order to solve an old conjecture
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bf16dcf31e7146de36cab313f5936619
https://doi.org/10.4064/sm8597-6-2016
https://doi.org/10.4064/sm8597-6-2016
Publikováno v:
RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia
instname
instname
[EN] For a compact set K subset of R-d we characterize the existence of a linear extension operator E: E(K) -> C-infinity (R-d) for the space of Whitney jets E(K) with a certain loss of derivatives sigma, that is, the operator satisfies the following
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::44d938405f8af6b36f9c04db8bd428d1
https://doi.org/10.1016/j.jmaa.2020.124142
https://doi.org/10.1016/j.jmaa.2020.124142
Publikováno v:
RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia
instname
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We prove that for a strongly continuous semigroup T on the Frechet space omega of all scalar sequences, its generator is a continuous linear operator A is an element of L(omega) and that, for all x is an element of omega and t >= 0, the series exp(tA
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0924cdcae93414d813068f75f6eb5ca7
https://doi.org/10.1016/j.jmaa.2013.10.053
https://doi.org/10.1016/j.jmaa.2013.10.053
Publikováno v:
RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia
instname
instname
[EN] For a compact set K subset of R-d we characterize the existence of a linear extension operator E: E (K) -> C-infinity(R-d) for the space of Whitney jets E (K) without loss of derivatives, that is, it satisfies the best possible continuity estima
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::61a4f7bf49d94b33442791c8d0a0f69e
http://hdl.handle.net/10251/82874
http://hdl.handle.net/10251/82874
Publikováno v:
Mathematical Programming 160 (2016) 1
Mathematical Programming, 160(1), 65-83
Mathematical Programming, 160(1), 65-83
In the last decade, copositive formulations have been proposed for a variety of combinatorial optimization problems, for example the stability number (independence number). In this paper, we generalize this approach to infinite graphs and show that t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::53fa70d0745ac7bb194a0e67ed6d430e
https://research.wur.nl/en/publications/a-copositive-formulation-for-the-stability-number-of-infinite-gra
https://research.wur.nl/en/publications/a-copositive-formulation-for-the-stability-number-of-infinite-gra