Enveloping Algebras of Prelie Algebras, Solomon idempotents and the Magnus Formula


We study the internal structure of enveloping algebras of preLie algebras. We show in particular that the canonical projections arising from the Poincaré-Birkhoff-Witt theorem can be computed explicitely. They happen to be closely related to the Magnus formula for matrix differential equations. Indeed, we show that the Magnus formula provides a way to… (More)
DOI: 10.1142/S0218196713400134

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