%0 Journal Article
%T Superization and (q,t)-specialization in combinatorial Hopf algebras
%A Jean-Christophe Novelli
%A Jean-Yves Thibon
%J Mathematics
%D 2008
%I arXiv
%X We extend a classical construction on symmetric functions, the superization process, to several combinatorial Hopf algebras, and obtain analogs of the hook-content formula for the (q,t)-specializations of various bases. Exploiting the dendriform structures yields in particular (q,t)-analogs of the Bjorner-Wachs q-hook-length formulas for binary trees, and similar formulas for plane trees.
%U http://arxiv.org/abs/0803.1816v1