Free Wishart Processes
M. Capitaine () and
C. Donati-Martin ()
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M. Capitaine: Université Paul Sabatier
C. Donati-Martin: LPMA-Université Paris 6
Journal of Theoretical Probability, 2005, vol. 18, issue 2, 413-438
Abstract:
Abstract Using a matrix approach, we define free Wishart processes of parameter λ > 0 and prove a free additivity property and invertibility for λ > 1. For λ ≥ 1, we show that a free Wishart process is a solution of a SDE of square Bessel process type, driven by a free complex Brownian motion. In the case λ > 1, we establish existence and uniqueness of a strong solution of such a SDE.
Keywords: Free probability; random matrices; Wishart processes (search for similar items in EconPapers)
Date: 2005
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DOI: 10.1007/s10959-005-3511-z
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