Solution of Cauchy problems modulo flat functions
Séminaire Équations aux dérivées partielles (Polytechnique) dit aussi "Séminaire Goulaouic-Schwartz" (1974-1975), Talk no. 11, 19 p.
@article{SEDP_1974-1975____A10_0,
     author = {Treves, F.},
     title = {Solution of {Cauchy} problems modulo flat functions},
     journal = {S\'eminaire \'Equations aux d\'eriv\'ees partielles (Polytechnique) dit aussi "S\'eminaire Goulaouic-Schwartz"},
     note = {talk:11},
     pages = {1--19},
     publisher = {Ecole Polytechnique, Centre de Math\'ematiques},
     year = {1974-1975},
     mrnumber = {410063},
     zbl = {0308.35083},
     language = {en},
     url = {http://archive.numdam.org/item/SEDP_1974-1975____A10_0/}
}
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Treves, F. Solution of Cauchy problems modulo flat functions. Séminaire Équations aux dérivées partielles (Polytechnique) dit aussi "Séminaire Goulaouic-Schwartz" (1974-1975), Talk no. 11, 19 p. http://archive.numdam.org/item/SEDP_1974-1975____A10_0/

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[4] Treves, F. - Local solvability in L2 of first order linear PDES, Amer. J. of Math., Vol XCII (1970), 369-380. | MR | Zbl