The combinatorial Hopf algebra of motivic dissection polylogarithms |
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Authors: | Clément Dupont |
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Institution: | Institut de Mathématiques de Jussieu-Paris Rive Gauche, 4 place Jussieu, 75005 Paris, France |
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Abstract: | We introduce a family of periods of mixed Tate motives called dissection polylogarithms, that are indexed by combinatorial objects called dissection diagrams. The motivic coproduct on the former is encoded by a combinatorial Hopf algebra structure on the latter. This generalizes Goncharov's formula for the motivic coproduct on (generic) iterated integrals. Our main tool is the study of the relative cohomology group corresponding to a bi-arrangement of hyperplanes. |
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Keywords: | 05E99 14C15 14F42 14N20 16T05 |
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