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THE FIVE INDEPENDENCES AS NATURAL PRODUCTS

    https://doi.org/10.1142/S0219025703001365Cited by:53 (Source: Crossref)

    Let be the class of all algebraic probability spaces. A "natural product" is, by definition, a map which is required to satisfy all the canonical axioms of Ben Ghorbal and Schürmann for "universal product" except for the commutativity axiom. We show that there exist only five natural products, namely tensor product, free product, Boolean product, monotone product and anti-monotone product. This means that, in a sense, there exist only five universal notions of stochastic independence in noncommutative probability theory.