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On the Spencer cohomology of a Lie equation. (English) Zbl 0264.58010
Partial diff. Equ., Berkeley 1971, Proc. Sympos. Pure Math. 23, 379-385 (1973).

58H05 Pseudogroups and differentiable groupoids
58J99 Partial differential equations on manifolds; differential operators
35N10 Overdetermined systems of PDEs with variable coefficients
22E65 Infinite-dimensional Lie groups and their Lie algebras: general properties