Although the evidence is still limited, a growing body of research suggests music may have beneficial effects for diseases such as Parkinson’s.
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We use Voiculescu’s free probability theory to prove the existence of prime factors, hence answering a longstanding problem in the theory of von Neumann algebras.
↵ e-mail: liming{at}math.mit.edu.
Richard V. Kadison, University of Pennsylvania, Philadelphia, PA