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arxiv: 1710.10851 · v1 · pith:EWTEJIYJnew · submitted 2017-10-30 · 🧮 math-ph · math.MP

A general formula for the Magnus expansion in terms of iterated integrals of right-nested commutators

classification 🧮 math-ph math.MP
keywords commutatorsgeneraliteratedmagnusright-nestedalgebracoefficientscombination
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We present a general expression for any term of the Magnus series as an iterated integral of a linear combination of independent right-nested commutators with given coefficients. The relation with the Malvenuto--Reutenauer Hopf algebra of permutations is also discussed.

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