114 citations
- Technische Universität BraunschweigDE4 papers
- University of GenoaIT3 papers
- Politecnico di TorinoIT2 papers
- Stanford UniversityUS2 papers
- Université de MontréalCA2 papers
- University of California San DiegoUS2 papers
- University of CambridgeGB2 papers
- University of GroningenNL2 papers
- Applied Mathematics (United States)US1 paper
- Astronomical Institute of the Slovak Academy of SciencesSK1 paper
- Australian National UniversityAU1 paper
- Cardiff UniversityGB1 paper
Showing 2007 · math.OAShow all
3 papers · 2 filters
math.OA2007
The K-Theory of Toeplitz C*-Algebras of Right-Angled Artin Groups
Nikolay A. Ivanov
To a graph one can associate a C^*-algebra generated by isometries. Such -algebras were studied recently by Crisp and Laca. They are a special case of the Toeplit…
math.OA2007★ 1 cited
Multiplication of free random variables and the S-transform: the case of vanishing mean
N. Raj Rao, Roland Speicher
This note extends Voiculescu's S-transform based analytical machinery for free multiplicative convolution to the case where the mean of the probability measures vanishes. We show t…
math.OA2007★ 1 cited
Operator-valued semicircular elements: Solving a quadratic matrix equation with positivity constraints
J. William Helton, Reza Rashidi Far, Roland Speicher
We show that the quadratic matrix equation , for given with positive real part and given analytic mapping with some positivity preserving properties, has ex…