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most citedThe Hopf algebra structure of multiple harmonic sums

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math.QA2008

Rooted trees and symmetric functions: Zhao's homomorphism and the commutative hexagon

Michael E. Hoffman

Recent work on perturbative quantum field theory has led to much study of the Connes-Kreimer Hopf algebra. Its (graded) dual, the Grossman-Larson Hopf algebra of rooted trees, had…