The Magnus expansion and post-Lie algebras

Curry, Charles; Ebrahimi-Fard, Kurusch; Owren, Brynjulf

doi:10.1090/mcom/3541

The Magnus expansion and post-Lie algebras
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by Charles Curry, Kurusch Ebrahimi-Fard and Brynjulf Owren HTML | PDF

Math. Comp. 89 (2020), 2785-2799 Request permission

Abstract:

We relate the classical and post-Lie Magnus expansions. Intertwining algebraic and geometric arguments allows us to place the classical Magnus expansion in the context of Lie group integrators.

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