corrigé par
Erratum à l'exposé n° 4
@article{SLS_1954-1955__2__A6_0, author = {Schwartz, L.}, title = {Conditions d'ellipticit\'e}, journal = {S\'eminaire Schwartz}, note = {talk:4}, pages = {1--7}, publisher = {Secr\'etariat math\'ematique}, volume = {2}, year = {1954-1955}, language = {fr}, url = {http://archive.numdam.org/item/SLS_1954-1955__2__A6_0/} }
Schwartz, L. Conditions d'ellipticité. Séminaire Schwartz, Tome 2 (1954-1955), Exposé no. 4, 7 p. http://archive.numdam.org/item/SLS_1954-1955__2__A6_0/