Geodesic
ECO Species
Séminaire lotharingien de combinatoire, 61A (2009-2011) 
Luca Ferrari; Pierre Leroux. ECO Species. Séminaire lotharingien de combinatoire, 61A (2009-2011). http://geodesic.mathdoc.fr/item/SLC_2009-2011_61A_a11/
@article{SLC_2009-2011_61A_a11,
     author = {Luca Ferrari and Pierre Leroux},
     title = {ECO {Species}},
     journal = {S\'eminaire lotharingien de combinatoire},
     year = {2009-2011},
     volume = {61A},
     url = {http://geodesic.mathdoc.fr/item/SLC_2009-2011_61A_a11/}
}
TY  - JOUR
AU  - Luca Ferrari
AU  - Pierre Leroux
TI  - ECO Species
JO  - Séminaire lotharingien de combinatoire
PY  - 2009-2011
VL  - 61A
UR  - http://geodesic.mathdoc.fr/item/SLC_2009-2011_61A_a11/
ID  - SLC_2009-2011_61A_a11
ER  - 
%0 Journal Article
%A Luca Ferrari
%A Pierre Leroux
%T ECO Species
%J Séminaire lotharingien de combinatoire
%D 2009-2011
%V 61A
%U http://geodesic.mathdoc.fr/item/SLC_2009-2011_61A_a11/
%F SLC_2009-2011_61A_a11

Voir la notice de l'acte provenant de la source Séminaire Lotharingien de Combinatoire website

We introduce the notion of ECO species, by means of which we are able to translate the ECO method into the language of (linear) species. We then define many operations on ECO species, reflecting the most common operations on the associated generating functions, and give examples illustrating such operations.