The universal pre-Lie-Rinehart algebras of aromatic trees

02/13/2020
by   Gunnar Fløystad, et al.
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We organize colored aromatic trees into a pre-Lie-Rinehart algebra (i.e. a flat torsion-free Lie-Rinehart algebra) endowed with a natural trace map, and show the freeness of this object among pre-Lie-Rinehart algebras with trace. This yields the algebraic foundations of aromatic B-series.

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