2019
DOI: 10.1007/978-3-319-96415-7_38
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What Is a Post-Lie Algebra and Why Is It Useful in Geometric Integration

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Cited by 16 publications
(17 citation statements)
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“…Remark 1. We remark that identity (14) encodes backward error analysis for the forward exponential Euler method [11,21]. Indeed, the Lie-Euler integration scheme is the numerical method that approximates solutions of the initial value problem (21) below by following Lie group exponentials, i.e.,…”
Section: Proposition 4 [12]mentioning
confidence: 99%
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“…Remark 1. We remark that identity (14) encodes backward error analysis for the forward exponential Euler method [11,21]. Indeed, the Lie-Euler integration scheme is the numerical method that approximates solutions of the initial value problem (21) below by following Lie group exponentials, i.e.,…”
Section: Proposition 4 [12]mentioning
confidence: 99%
“…In this article, we show that by an appropriate 'autonomization' the linear initial value problem (1) can be presented as a Lie group integration problem along the lines of [19]. In this context, post-Lie algebras [21,11] occur naturally replacing pre-Lie algebras. The classical Magnus expansion (2) is seen to be a special case of the so-called post-Lie Magnus expansion introduced in [11,12,13].…”
Section: Introductionmentioning
confidence: 99%
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“…is called Lie bracket): [21] ≡ 0, (1.9) 14) in which a denotes the associator of a binary operation, i. e.,…”
Section: Free Operads and Algebraic Operadsmentioning
confidence: 99%
“…Just to mention a few examples, pre-Lie algebras play an important role in the approach of Connes and Kreimer to the theory of renormalization of qFT (see [12]) and in the Butcher theory of the geometric integration methods on R n [13]. In the attempt to extend these methods to more general homogeneous spaces, Munthe-Kaas introduced the so called Lie-Butcher series, [14], whose composition is ruled by a new category of non-associative algebraic structures, which were called post-Lie algebras. While a model example of a pre-Lie algebra is provided by (X(M), ∇), where X(M) is the vector space of vector fields defined on M and ∇ is a flat and torsion free connection on T M, the model example of a post-Lie algebra is the pair (X(M), ∇) where X(M) is as before and ∇ is now a flat and constant torsion linear connection.…”
Section: Introductionmentioning
confidence: 99%