In mathematics, Spencer cohomology is cohomology of a manifold with coefficients in the sheaf of solutions of a linear partial differential operator. It was introduced by Donald C. Spencer in 1969.
References
Lychagin, Valentin (2001) [1994], "Spencer cohomology", Encyclopedia of Mathematics, EMS Presss
Spencer, D. C. (1969), "Overdetermined systems of linear partial differential equations", Bulletin of the American Mathematical Society, 75 (2): 179–239, doi:10.1090/S0002-9904-1969-12129-4, ISSN 0002-9904, MR 0242200
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