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math.QA2016
Internally connected graphs and the Kashiwara-Vergne Lie algebra
Matteo Felder
It is conjectured that the Kashiwara-Vergne Lie algebra is isomorphic to the direct sum of the Grothendieck-Teichmüller Lie algebra …
math.QA2016
On the irrationality of certain coefficients of the Alekseev-Torossian associator
Matteo Felder
We give explicit formulas for the first few coefficients of the Alekseev-Torossian associator and a second Drinfeld associator. This is done by analyzing the free and transitive ac…