Mathematics – Combinatorics
Scientific paper
2010-09-10
Mathematics
Combinatorics
20 pages
Scientific paper
We construct explicit polynomial realizations of some combinatorial Hopf algebras based on various kind of trees or forests, and some more general classes of graphs, ranging from the Connes-Kreimer algebra to an algebra of labelled forests isomorphic to the Hopf algebra of parking functions, and to a new noncommutative algebra based on endofunctions admitting many interesting subalgebras and quotients.
Foissy Loïc
Novelli Jean-Christophe
Thibon Jean-Yves
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