Zobrazeno 1 - 10
of 79
pro vyhledávání: '"G. Katsoulis"'
Publikováno v:
Radioengineering, Vol 14, Iss 1, Pp 12-19 (2005)
This paper investigates the application of wavelet transform (WT) tothe extraction of particular features of direct sequence spreadspectrum signals. The WT is exploited to the point that not only itscapabilities but also its limitations are exposed t
Externí odkaz:
https://doaj.org/article/8cf7941cc70c43909ae6ef6bc3039ac7
Autor:
Elias G. Katsoulis
Publikováno v:
Israel Journal of Mathematics. 240:223-251
We establish the Hao–Ng isomorphism for generalized gauge actions of locally compact abelian groups on product systems over abelian lattice orders and we then use it to explore Takai duality in this context. As an application we generalize some rec
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::35b5bdd0a37c380294b423252a019b48
https://doi.org/10.1007/s11856-020-2063-3
https://doi.org/10.1007/s11856-020-2063-3
Autor:
Elias G. Katsoulis, Christopher Ramsey
Publikováno v:
Forum of Mathematics, Sigma. 10
We resolve the isomorphism problem for tensor algebras of unital multivariable dynamical systems. Specifically, we show that unitary equivalence after a conjugation for multivariable dynamical systems is a complete invariant for complete isometric is
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f196ee3587af58634b41277a7ac93556
https://doi.org/10.1017/fms.2022.73
https://doi.org/10.1017/fms.2022.73
Autor:
Christopher Ramsey, Elias G. Katsoulis
Publikováno v:
International Mathematics Research Notices. 2021:1160-1197
In an earlier work, the authors proposed a non-selfadjoint approach to the Hao–Ng isomorphism problem for the full crossed product, depending on the validity of two conjectures stated in the broader context of crossed products for operator algebras
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::204a1fc7a2ff9768cd232b475b62f344
https://doi.org/10.1093/imrn/rnz271
https://doi.org/10.1093/imrn/rnz271
Publikováno v:
Journal of Functional Analysis. 283:109564
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2265b0ef686850700a89790c7cc84ca1
https://doi.org/10.1016/j.jfa.2022.109564
https://doi.org/10.1016/j.jfa.2022.109564
Autor:
Christopher Ramsey, Elias G. Katsoulis
Publikováno v:
Journal of Functional Analysis. 275:1173-1207
Let ( G , Σ ) be a (partially) ordered abelian group with Haar measure μ, let ( A , G , α ) be a dynamical system and let A ⋊ α Σ be the associated semicrossed product. Using Takai duality we establish a stable isomorphism A ⋊ α Σ ∼ s (
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::72624b99c3e0eb047f2b227ce408b2de
https://doi.org/10.1016/j.jfa.2018.05.012
https://doi.org/10.1016/j.jfa.2018.05.012
A higher rank numerical semigroup is a positive cone whose seminormalization is isomorphic to the free abelian semigroup. The corresponding nonselfadjoint semigroup algebras are known to provide examples that answer Arveson's Dilation Problem to the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cd28bf542dc9c985e631f8b263a3a55e
Autor:
Elias G. Katsoulis, Christopher Ramsey
The authors study crossed products of arbitrary operator algebras by locally compact groups of completely isometric automorphisms. They develop an abstract theory that allows for generalizations of many of the fundamental results from the selfadjoint
Autor:
Elias G. Katsoulis, Adam Dor-On
Publikováno v:
Journal of Functional Analysis. 278:108416
Let ( G , P ) be an abelian, lattice ordered group and let X be a compactly aligned product system over P with coefficients in A . We show that the C*-envelope of the Nica tensor algebra N T X + coincides with both Sehnem's covariance algebra A × X
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d097970f66c62be64439578261dcba9c
https://doi.org/10.1016/j.jfa.2019.108416
https://doi.org/10.1016/j.jfa.2019.108416
Autor:
Christopher Ramsey, Elias G. Katsoulis
Publikováno v:
Journal of Mathematical Analysis and Applications. 483:123611
Given a C ⁎ -correspondence X, we give necessary and sufficient conditions for the tensor algebra T X + to be hyperrigid. In the case where X is coming from a topological graph we obtain a complete characterization.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4606572651103756e160c80103a45d2f
https://doi.org/10.1016/j.jmaa.2019.123611
https://doi.org/10.1016/j.jmaa.2019.123611