Zobrazeno 1 - 10
of 11
pro vyhledávání: '"Matthew Wiersma"'
Publikováno v:
Geometric and Functional Analysis. 30:1402-1438
We develop a new method, based on non-vanishing of second cohomology groups, for proving the failure of lifting properties for full C $$^*$$ -algebras of countable groups with (relative) property (T). We derive that the full C $$^*$$ -algebras of the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f1742ca6db31b882b8f3c1ca6786cd41
https://doi.org/10.1007/s00039-020-00550-4
https://doi.org/10.1007/s00039-020-00550-4
Publikováno v:
Journal of Mathematical Analysis and Applications. 506:125528
We study constructions of ideals in the Fourier-Stieltjes algebra B ( G ) that are related to L p ( G ) . For 1 ≤ p ∞ , these constructions include the norm and weak*-closures of span ( P ( G ) ∩ L p ( G ) ) and B ( G ) ∩ L p ( G ) inside of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ecd01883f4caa0eeb249e38ae233f2cc
https://doi.org/10.1016/j.jmaa.2021.125528
https://doi.org/10.1016/j.jmaa.2021.125528
Autor:
Ebrahim Samei, Matthew Wiersma
A locally compact group $G$ is called Hermitian if the spectrum $\text{Sp}_{L^1(G)}(f)\subseteq\mathbb R$ for every $f\in L^1(G)$ satisfying $f=f^*$, and called quasi-Hermitian if $\text{Sp}_{L^1(G)}(f)\subseteq\mathbb R$ for every $f\in C_c(G)$ sati
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::63561eedd44a5249828bc2e271772079
http://arxiv.org/abs/1805.07908
http://arxiv.org/abs/1805.07908
Publikováno v:
The FASEB Journal. 32
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::497e664a1d37b8ab102c40b7bfb8f3ce
https://doi.org/10.1096/fasebj.2018.32.1_supplement.588.4
https://doi.org/10.1096/fasebj.2018.32.1_supplement.588.4
Autor:
Matthew Wiersma
Publikováno v:
Journal of Functional Analysis. 269:3928-3951
Let G be a locally compact group and 1 ≤ p ∞ . A continuous unitary representation π : G → B ( H ) of G is an L p -representation if the matrix coefficient functions s ↦ 〈 π ( s ) x , x 〉 lie in L p ( G ) for sufficiently many x ∈ H .
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e51e6f5d58552c567556d9b9e05f1cf5
https://doi.org/10.1016/j.jfa.2015.09.016
https://doi.org/10.1016/j.jfa.2015.09.016
Autor:
Matthew Wiersma
A locally compact group G has the factorization property if the map C ⁎ ( G ) ⊙ C ⁎ ( G ) ∋ a ⊗ b ↦ λ ( a ) ρ ( b ) ∈ B ( L 2 ( G ) ) is continuous with respect to the minimal C*-norm. This paper seeks to initiate a rigorous study of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c9e853ebbc1aea7fee388df6ee7c72cb
Autor:
Matthew Wiersma
A QSIN group is a locally compact group G whose group algebra $\mathrm L^{1}(G)$ admits a quasi-central bounded approximate identity. Examples of QSIN groups include every amenable group and every discrete group. It is shown that if G is a QSIN group
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4d55e0e8a0ea5f654f98655b3ecebf55
Autor:
Matthew Wiersma
Publikováno v:
Illinois J. Math. 60, no. 3-4 (2016), 655-667
Let $\Gamma$ be a discrete group. When $\Gamma$ is nonamenable, the reduced and full group $C$∗-algebras differ and it is generally believed that there should be many intermediate $C$∗-algebras, however few examples are known. In this paper, we g
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1341845bb1e3e51bed5ae0610e1cae7a
https://projecteuclid.org/euclid.ijm/1506067285
https://projecteuclid.org/euclid.ijm/1506067285
Autor:
Matthew Wiersma
The category of $C^*$-algebras is blessed with many different tensor products. In contrast, virtually the only tensor product ever used in the category of von Neumann algebras is the normal spatial tensor product. We propose a definition of what a ge
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c1eb47c676c1c0b621c650a9d05b52ff
http://arxiv.org/abs/1506.01671
http://arxiv.org/abs/1506.01671
Autor:
Zhong Jin Ruan, Matthew Wiersma
Let $\Gamma$ be a discrete group. A $C^*$-algebra $A$ is an exotic $C^*$-algebra (associated to $\Gamma$) if there exist proper surjective $C^*$-quotients $C^*(\Gamma)\to A\to C^*_r(\Gamma)$. In this paper, we show that a large class of exotic $C^*$-
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b6b109e28393949b943ce9e86158675b