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L’involutivite des caractéristiques des systèmes différentiels et microdifférentiels. (French) Zbl 0423.46033
Seminaire Bourbaki, Vol. 1977/78, Expose No. 522, Lect. Notes Math. 710, 277-289 (1979).

MSC:
46F15 Hyperfunctions, analytic functionals
32A45 Hyperfunctions
47F05 General theory of partial differential operators
46M20 Methods of algebraic topology in functional analysis (cohomology, sheaf and bundle theory, etc.)
Full Text: Numdam EuDML