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On sums of homogeneous locally nilpotent derivations
Published 12 Nov 2012 in math.AC and math.AG | (1211.2752v1)
Abstract: Let A be a commutative associative integrally closed k-algebra without zero divisors effectively graded by a lattice. We obtain a criterion of local nilpotency of the sum of two homogeneous locally nilpotent derivations (LNDs) of fiber type on A in terms of their degrees. The same problem is solved for commutators of two homogeneous LNDs.
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