Abstract
It is shown that a moduleL over the sheafO of germs of holomorphic functions on a domain G of Cn is injective if and only if the following conditions are satisfied; a)L is flabby; b) for every closed set S ⊂G and every point z λ G, the stalk se z of the sheafS L;U1→Γ S (U:L) is an injectiveO z -module. It follows in particular that the sheaf of germs of hyperfunctions is injective over the sheaf of germs of analytic functions.
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A. Grothendieck, “Sur quelques points d'algebre homologique,” Tohoku Math. J.,9, 119–221 (1957).
B. Eckman and A. Schopf, “Über injective Moduln,” Archiv d. Math.,4, No. 2, 75–78 (1953).
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Translated from Matematicheskie Zametki, Vol. 18, No. 4, pp. 589–596, October, 1975.
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Golovin, V.D. Criteria for the injectivity of analytic sheaves. Mathematical Notes of the Academy of Sciences of the USSR 18, 939–942 (1975). https://doi.org/10.1007/BF01153048
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DOI: https://doi.org/10.1007/BF01153048