Preprint
Sep 2026
A Hopf Algebraic Theory of the Quantum Magnusian
We develop a Hopf-algebraic theory of the graph coefficients arising in the quantum Magnus expansion. At the classical level, the graph expansion is governed by directed trees, whereas its quantum counterpart involves loop graphs, multiple edges, and different types of edge data. We introduce a contraction Hopf algebra...
Li Guo, Joon-Hwi Kim, Jung-Wook Kim et al.
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