Geodesic
Δ-matroids and Pfaffian Forms
Séminaire lotharingien de combinatoire, Tome 26 (1991) 
Walter Wenzel. Δ-matroids and Pfaffian Forms. Séminaire lotharingien de combinatoire, Tome 26 (1991). http://geodesic.mathdoc.fr/item/SLC_1991_26_a2/
@article{SLC_1991_26_a2,
     author = {Walter Wenzel},
     title = {\ensuremath{\Delta}-matroids and {Pfaffian} {Forms}},
     journal = {S\'eminaire lotharingien de combinatoire},
     year = {1991},
     volume = {26},
     url = {http://geodesic.mathdoc.fr/item/SLC_1991_26_a2/}
}
TY  - JOUR
AU  - Walter Wenzel
TI  - Δ-matroids and Pfaffian Forms
JO  - Séminaire lotharingien de combinatoire
PY  - 1991
VL  - 26
UR  - http://geodesic.mathdoc.fr/item/SLC_1991_26_a2/
ID  - SLC_1991_26_a2
ER  - 
%0 Journal Article
%A Walter Wenzel
%T Δ-matroids and Pfaffian Forms
%J Séminaire lotharingien de combinatoire
%D 1991
%V 26
%U http://geodesic.mathdoc.fr/item/SLC_1991_26_a2/
%F SLC_1991_26_a2

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

In analogy to the fact that representable matroids may be defined in terms of Grassmann-Plücker maps we want to describe representability of Δmatroids by skew-symmetric matrices in terms of Pfaffian forms.