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Infinitesimal freeness for orthogonally invariant random matrices (2506.05139v1)
Published 5 Jun 2025 in math.PR and math.OA
Abstract: We introduce a new kind of free independence, called real infinitesimal freeness. We show that independent orthogonally invariant with infinitesimal laws are asymptotically real infinitesimally free. We introduce new cumulants, called real infinitesimal cumulants and show that real infinitesimal freeness is equivalent to vanishing of mixed cumulants. We prove the formula for cumulants with products as entries.
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