Finiteness of Subintegrality

Part of the NATO ASI Series book series (ASIC, volume 407)


Let A and B be commutative algebras containing the rationals, with A contained in B,and B subintegral over A. In an earlier paper the authors showed that if A is excellent of finite Krull dimension then there is a natural isomorphism from B/A to the group of invertible A-submodules of B. In the present paper we remove the requirement that A be excellent of finite Krull dimension.


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  1. [1]
    Leslie G. Roberts and Balwant Singh, Subintegrality, invertible modules and the Picard group, to appear in Compositio Mathematica.Google Scholar
  2. [2]
    R. G. Swan, On seminormality, J. Algebra 67 (1980) 210 - 229.MathSciNetzbMATHCrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media Dordrecht 1993

Authors and Affiliations

  1. 1.Department of MathematicsSouthwest Missouri State UniversitSpringfieldUSA
  2. 2.Department of Mathematics and StatisticsQueen’s UniversityKingstonCanada
  3. 3.School of MathematicsTata Institute of Fundamental ResearchBombayIndia

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