Abstract
The formal complex spaces, introduced by Krasnov [24] and independently by the author, are the analytic analogues of the formal schemes of Zariski and Grothendieck. Special cases are the formal completions of complex spaces along analytic sets, see Banica [3]. The technique of formal complex spaces has proved to be a useful tool in analytic geometry and allows even applications to purely algebraic problems, see [24], [4] and [7]. Here the basic theory of these spaces is developed: coherence of the structure sheave, description of the coherent modules, Grauert's coherence theorem for proper maps.... We further study the question of exactness of the formal Dolbeault and de Rham complexes.
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Bingener, J. Über formale komplexe Räume. Manuscripta Math 24, 253–293 (1978). https://doi.org/10.1007/BF01167833
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DOI: https://doi.org/10.1007/BF01167833