Zobrazeno 1 - 10
of 115
pro vyhledávání: '"Winfried Sickel"'
Autor:
Jon Johnsen, Winfried Sickel
Publikováno v:
Journal of Function Spaces and Applications, Vol 5, Iss 2, Pp 183-198 (2007)
The article deals with a simplified proof of the Sobolev embedding theorem for Lizorkin–Triebel spaces (that contain the Lp-Sobolev spaces Hps as special cases). The method extends to a proof of the corresponding fact for general Lizorkin–Triebel
Externí odkaz:
https://doaj.org/article/867b215ff2e74a5481b752e82cd54c64
Publikováno v:
Journal of Differential Equations. 279:198-244
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b7054557c9ab3e5138ea361d3d09035a
https://doi.org/10.1016/j.jde.2021.01.017
https://doi.org/10.1016/j.jde.2021.01.017
Autor:
Winfried Sickel
Publikováno v:
Proceedings of the Steklov Institute of Mathematics. 312:162-178
We investigate the regularity of the set of all products $$f\cdot g$$ for $$f$$ and $$g$$ belonging to certain Nikol’skii–Besov spaces. The special situation we are interested in has been left open in earlier contributions. It represents a limiti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9c2f1343a604e1f94d73a18950d79fe8
https://doi.org/10.1134/s0081543821010090
https://doi.org/10.1134/s0081543821010090
Autor:
Winfried Sickel
Publikováno v:
Trudy Matematicheskogo Instituta imeni V.A. Steklova. 312:170-187
Исследуется регулярность множества всех произведений $f\cdot g$ для функций $f$ и $g$, принадлежащих некоторым пространствам Никольского-Бесо
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4f71b52cc8790c1ae2c22db7c72c0795
https://doi.org/10.4213/tm4137
https://doi.org/10.4213/tm4137
Publikováno v:
Analysis and Geometry in Metric Spaces, Vol 8, Iss 1, Pp 268-304 (2020)
In this article the authors study complex interpolation of Sobolev-Morrey spaces and their generalizations, Lizorkin-Triebel-Morrey spaces. Both scales are considered on bounded domains. Under certain conditions on the parameters the outcome belongs
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f3f49869036835b669ef617b23fd2c63
https://doaj.org/article/ced2686bf1a84b9aabfa04f1a2f680d1
https://doaj.org/article/ced2686bf1a84b9aabfa04f1a2f680d1
Publikováno v:
Eurasian Mathematical Journal. 11:25-56
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3b3b98608def6c5d01590f4140acb17c
https://doi.org/10.32523/2077-9879-2020-11-1-25-56
https://doi.org/10.32523/2077-9879-2020-11-1-25-56
Publikováno v:
Studia Mathematica. 253:129-162
Some Besov-type spaces $B^{s,\tau}_{p,q}(\mathbb{R}^n)$ can be characterized in terms of the behavior of the Fourier--Haar coefficients. In this article, the authors discuss some necessary restrictions for the parameters $s$, $\tau$, $p$, $q$ and $n$
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::edfbb5c6d02f1c372d88ee295aabdbd8
https://doi.org/10.4064/sm180828-9-7
https://doi.org/10.4064/sm180828-9-7
Publikováno v:
Complex Variables and Elliptic Equations. 65:22-39
In case 1
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::415cba6d92d3b31c249638ebed588b5a
https://doi.org/10.1080/17476933.2019.1631294
https://doi.org/10.1080/17476933.2019.1631294
Publikováno v:
Journal of Approximation Theory. 279:105745
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::84e1d2d984bfde044d16af4b0949d300
https://doi.org/10.1016/j.jat.2022.105745
https://doi.org/10.1016/j.jat.2022.105745
Autor:
Winfried Sickel
Publikováno v:
Springer INdAM Series ISBN: 9783030613457
In this survey we shall deal with the regularity of characteristic functions \({\mathcal X}_E\) of subsets E of \({\mathbb {R}}^d\) in the framework of Besov spaces. We will describe a number of necessary and sufficient conditions to guarantee member
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fed3474af81787415670f864aee662e6
https://doi.org/10.1007/978-3-030-61346-4_18
https://doi.org/10.1007/978-3-030-61346-4_18
