The Deligne-Drinfeld conjecture asserts that the graded Grothendieck-Teichmüller Lie algebra over 
is a free Lie algebra with
one generator in each odd weight 3, 5, 7, .... Weight is the total
degree in the two generators used in its defining equations. The assertion includes
both absence of relations among the proposed generators and generation of the whole
Lie algebra.
Deligne-Drinfeld Conjecture
See also
Free Lie Algebra, Grothendieck-Teichmueller Lie Algebra, Lie AlgebraExplore with Wolfram|Alpha
References
Alm, J. "The Grothendieck-Teichmueller Lie Algebra and Brown's Dihedral Moduli Spaces." 17 May 2018. https://arxiv.org/abs/1805.06684.Cite this as:
Weisstein, Eric W. "Deligne-Drinfeld Conjecture." From MathWorld--A Wolfram Resource. https://mathworld.wolfram.com/Deligne-DrinfeldConjecture.html