Universal C*-algebras defined by completely bounded unital homomorphisms

Verfasser / Beitragende:
[Wen Qian, Don Hadwin]
Ort, Verlag, Jahr:
2015
Enthalten in:
Acta Mathematica Sinica, English Series, 31/12(2015-12-01), 1825-1844
Format:
Artikel (online)
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024 7 0 |a 10.1007/s10114-015-5214-4  |2 doi 
035 |a (NATIONALLICENCE)springer-10.1007/s10114-015-5214-4 
245 0 0 |a Universal C*-algebras defined by completely bounded unital homomorphisms  |h [Elektronische Daten]  |c [Wen Qian, Don Hadwin] 
520 3 |a Suppose A is a unital C*-algebra and r > 1. In this paper, we define a unital C*-algebra C* cb (A, r) and a completely bounded unital homomorphism α r : A → C* cb (A, r) with the property that C* cb (A, r) = C*(α r (A)) and, for every unital C*-algebra B and every unital completely bounded homomorphism φ: A → B, there is a (unique) unital *-homomorphism π: C* cb (A, r) → B such that φ = π ◦ α r . We prove that, if A is generated by a normal set {t λ : λ ∈ Λ}, then C* cb (A, r) is generated by the set {α r (t λ ): λ ∈ Λ}. By proving an equation of the norms of elements in a dense subset of C* cb (A, r) we obtain that, if B is a unital C*-algebra that can be embedded into A, then C* cb (B, r) can be naturally embedded into C* cb (A, r). We give characterizations of C* cb (A, r) for some special situations and we conclude that C* cb (A, r) will be "nice” when dim(A) ≤ 2 and "quite complicated” when dim(A) ≥ 3. We give a characterization of the relation between K-groups of A and K-groups of C* cb (A, r). We also define and study some analogous of C* cb (A, r). 
540 |a Institute of Mathematics, Academy of Mathematics and Systems Science, Chinese Academy of Sciences, Chinese Mathematical Society and Springer-Verlag Berlin Heidelberg, 2015 
690 7 |a Completely bounded unital homomorphisms  |2 nationallicence 
690 7 |a universal C*-algebras  |2 nationallicence 
690 7 |a K -groups  |2 nationallicence 
700 1 |a Qian  |D Wen  |u Department of Mathematics, East China University of Science and Technology, 200237, Shanghai, P. R. China  |4 aut 
700 1 |a Hadwin  |D Don  |u Department of Mathematics and Statistics, University of New Hampshire, 03824, Durham, NH, USA  |4 aut 
773 0 |t Acta Mathematica Sinica, English Series  |d Institute of Mathematics, Chinese Academy of Sciences and Chinese Mathematical Society  |g 31/12(2015-12-01), 1825-1844  |x 1439-8516  |q 31:12<1825  |1 2015  |2 31  |o 10114 
856 4 0 |u https://doi.org/10.1007/s10114-015-5214-4  |q text/html  |z Onlinezugriff via DOI 
898 |a BK010053  |b XK010053  |c XK010000 
900 7 |a Metadata rights reserved  |b Springer special CC-BY-NC licence  |2 nationallicence 
908 |D 1  |a research-article  |2 jats 
949 |B NATIONALLICENCE  |F NATIONALLICENCE  |b NL-springer 
950 |B NATIONALLICENCE  |P 856  |E 40  |u https://doi.org/10.1007/s10114-015-5214-4  |q text/html  |z Onlinezugriff via DOI 
950 |B NATIONALLICENCE  |P 700  |E 1-  |a Qian  |D Wen  |u Department of Mathematics, East China University of Science and Technology, 200237, Shanghai, P. R. China  |4 aut 
950 |B NATIONALLICENCE  |P 700  |E 1-  |a Hadwin  |D Don  |u Department of Mathematics and Statistics, University of New Hampshire, 03824, Durham, NH, USA  |4 aut 
950 |B NATIONALLICENCE  |P 773  |E 0-  |t Acta Mathematica Sinica, English Series  |d Institute of Mathematics, Chinese Academy of Sciences and Chinese Mathematical Society  |g 31/12(2015-12-01), 1825-1844  |x 1439-8516  |q 31:12<1825  |1 2015  |2 31  |o 10114