DMTCS Proceedings, 2005 International Conference on Analysis of Algorithms

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Algorithmic and combinatoric aspects of multiple harmonic sums

Christian Costermans, Jean-Yves Enjalbert, Hoang Ngoc Minh


Ordinary generating series of multiple harmonic sums admit a full singular expansion in the basis of functions {(1-z)αlogβ(1-z)}α∈ℤ, β∈ℕ, near the singularity z=1. A constructive proof of this result is given, and, by combinatoric aspects, an explicit evaluation of Taylor coefficients of functions in some polylogarithmic algebra is obtained. In particular, the asymptotic expansion of multiple harmonic sums is easily deduced.

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