@article{SEDP_1989-1990____A20_0, author = {Levy-Bruhl, P. and Mohamed, A. and Nourrigat, J.}, title = {\'Etude spectrale d'op\'erateurs sur des groupes nilpotents}, journal = {S\'eminaire \'Equations aux d\'eriv\'ees partielles (Polytechnique) dit aussi "S\'eminaire Goulaouic-Schwartz"}, note = {talk:18}, pages = {1--8}, publisher = {Ecole Polytechnique, Centre de Math\'ematiques}, year = {1989-1990}, zbl = {0733.35086}, language = {fr}, url = {http://archive.numdam.org/item/SEDP_1989-1990____A20_0/} }