Multivariable moment problems

Multivariable moment problems In this paper we solve moment problems for Poisson transforms and, more generally, for completely positive linear maps on unital C *-algebras generated by “universal” row contractions associated with $$\mathbb{F}_{n}^{+}$$ , the free semigroup with n generators. This class of C*-algebras includes the Cuntz-Toeplitz algebra $$C^{*} (S_{1}, \ldots, S_{n})$$ (resp. $$C^{*} (B_{1}, \ldots, B_{n})$$ ) generated by the creation operators on the full (resp. symmetric, or anti-symmetric)) Fock space with n generators. As consequences, we obtain characterizations for the orbits of contractive Hilbert modules over complex free semigroup algebras such as $$\mathbb{CF}_{n}^{+}, \mathbb{C}[z_{1}, \ldots, z_{n}]$$ ,and, more generally, the quotient algebra $$\mathbb{CF}_{n}^{+}$$ , where J is an arbitrary two-sided ideal of $$\mathbb{CF}_{n}^{+}$$ . All these results are extended to the generalized Cuntz algebra $$\cal{O} (x_{i=1}^{n} G_{i}^{+})$$ , where G i + are the positive cones ofdiscrete subgroups G i + of the real line $$\mathbb{R}$$ . Moreover, we characterize the orbits of Hilbert modules over the quotient algebra $$\mathbb{C}_{i=1}^{*n} G_{i}^{+}/J$$ , where J is an arbitrary two-sided ideal ofthe free semigroup algebra $$\mathbb{C}_{i=1}^{*n} G_{i}^{+}$$ . Positivity Springer Journals

Multivariable moment problems

Positivity , Volume 8 (4) – Sep 11, 2004

Loading next page...
Kluwer Academic Publishers
Copyright © 2004 by Kluwer Academic Publishers
Mathematics; Fourier Analysis; Operator Theory; Potential Theory; Calculus of Variations and Optimal Control; Optimization; Econometrics
Publisher site
See Article on Publisher Site


You’re reading a free preview. Subscribe to read the entire article.

DeepDyve is your
personal research library

It’s your single place to instantly
discover and read the research
that matters to you.

Enjoy affordable access to
over 12 million articles from more than
10,000 peer-reviewed journals.

All for just $49/month

Explore the DeepDyve Library

Unlimited reading

Read as many articles as you need. Full articles with original layout, charts and figures. Read online, from anywhere.

Stay up to date

Keep up with your field with Personalized Recommendations and Follow Journals to get automatic updates.

Organize your research

It’s easy to organize your research with our built-in tools.

Your journals are on DeepDyve

Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.

All the latest content is available, no embargo periods.

See the journals in your area

Monthly Plan

  • Read unlimited articles
  • Personalized recommendations
  • No expiration
  • Print 20 pages per month
  • 20% off on PDF purchases
  • Organize your research
  • Get updates on your journals and topic searches


Start Free Trial

14-day Free Trial

Best Deal — 39% off

Annual Plan

  • All the features of the Professional Plan, but for 39% off!
  • Billed annually
  • No expiration
  • For the normal price of 10 articles elsewhere, you get one full year of unlimited access to articles.



billed annually
Start Free Trial

14-day Free Trial