Séminaire Lotharingien de Combinatoire, B14Sa (1986).
Francois Bergeron
Une combinatoire du pléthysme
Abstract.
Let F(x1,x2,...)
and $G(x1,x2,...)
be formal power series in infinitely many variables.
The plethysm FoG is the
series F(G1,G2,...)
where Gk(x1,x2,...) =
G(x1k,x2k,...).
Using ideas from O. Nava and G.-C. Rota [Adv. in Math. 58 (1985),
61-88], we explain the combinatorics
underlying plethysms by defining a binary operation called
substitution on S-species.
The paper has been finally published under the same title in
J. Combin. Theory Ser. A 46 (1987), 291-305.