Lower bounds for pseudo-differential operators
Séminaire Équations aux dérivées partielles (Polytechnique) (1989-1990), Talk no. 1, 8 p.
@article{SEDP_1989-1990____A1_0,
     author = {Lerner, Nicolas and Nourrigat, Jean},
     title = {Lower bounds for pseudo-differential operators},
     journal = {S\'eminaire \'Equations aux d\'eriv\'ees partielles (Polytechnique)},
     publisher = {Ecole Polytechnique, Centre de Math\'ematiques},
     year = {1989-1990},
     note = {talk:1},
     zbl = {0729.35151},
     mrnumber = {1091836},
     language = {en},
     url = {http://www.numdam.org/item/SEDP_1989-1990____A1_0}
}
Lerner, N.; Nourrigat, J. Lower bounds for pseudo-differential operators. Séminaire Équations aux dérivées partielles (Polytechnique) (1989-1990), Talk no. 1, 8 p. http://www.numdam.org/item/SEDP_1989-1990____A1_0/

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