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Relations between Derivations arising from Modular Forms
Denote by L(a; b) the free complex Lie algebra on the two generators a and b. For each integer m 0 there is a derivation 2m on L(a; b) that satis es 2m([a; b]) = 0 and 2m(a) = ad(a)2m(b). In this paper we study the ...