International Mathematics Research Notices Advance Access published online on February 24, 2009
International Mathematics Research Notices, doi:10.1093/imrn/rnp021
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Non-adic Formal Schemes
Department of Mathematics and Computer Science, Faculty of Science, Kagoshima University, 1-21-35 Korimoto, Kagoshima 890-0065, Japan
Correspondence: Correspondence to be sent to: yasuda{at}sci.kagoshi-u.ac.jp
Our purpose is to make a contribution to the foundation of the theory of formal scheme. We are interested particularly in non-Noetherian or non-adic formal schemes, which have been little studied. We redefine the formal scheme as a proringed space and study its basic properties. We also find several examples of non-adic formal schemes.