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Ext(A,B) carries a natural group structure and one of the striking problems in abelian group theory is to determine completely the structure of Ext(A,B) for various groups A and B. In this book we will concentrate on the case of abelian groups and in some cases on modules over subrings of the rational numbers. In particular we ask, when Ext(A,B) is torsion-free. This book contains answers for finite rank groups A and B and also sheds some light on the infinite rank case, e.g. a generalization of coseparability. Furthermore we introduce the reader in the concept of torsion-free pairs, a generalization of Salce's cotorsion-theories.
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studied math at the University of Duisburg-Essen. Since 2008 he is lecturer on algebra and geometry.
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- PublisherSuedwestdeutscher Verlag fuer Hochschulschriften
- Publication date2010
- ISBN 10 3838117883
- ISBN 13 9783838117881
- BindingPaperback
- Number of pages100
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Extensions of Abelian Groups: and Torsion-Free Pairs
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Extensions of Abelian Groups
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Book Description Taschenbuch. Condition: Neu. This item is printed on demand - it takes 3-4 days longer - Neuware -Ext(A,B) carries a natural group structure and one of the striking problems in abelian group theory is to determine completely the structure of Ext(A,B) for various groups A and B. In this book we will concentrate on the case of abelian groups and in some cases on modules over subrings of the rational numbers. In particular we ask, when Ext(A,B) is torsion-free. This book contains answers for finite rank groups A and B and also sheds some light on the infinite rank case, e.g. a generalization of coseparability. Furthermore we introduce the reader in the concept of torsion-free pairs, a generalization of Salce s cotorsion-theories. 100 pp. Englisch. Seller Inventory # 9783838117881
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Extensions of Abelian Groups and TorsionFree Pairs
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Extensions of Abelian Groups : and Torsion-Free Pairs
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Book Description Taschenbuch. Condition: Neu. nach der Bestellung gedruckt Neuware - Printed after ordering - Ext(A,B) carries a natural group structure and one of the striking problems in abelian group theory is to determine completely the structure of Ext(A,B) for various groups A and B. In this book we will concentrate on the case of abelian groups and in some cases on modules over subrings of the rational numbers. In particular we ask, when Ext(A,B) is torsion-free. This book contains answers for finite rank groups A and B and also sheds some light on the infinite rank case, e.g. a generalization of coseparability. Furthermore we introduce the reader in the concept of torsion-free pairs, a generalization of Salce s cotorsion-theories. Seller Inventory # 9783838117881
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Extensions of Abelian Groups and TorsionFree Pairs
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Extensions of Abelian Groups
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Book Description Condition: New. Dieser Artikel ist ein Print on Demand Artikel und wird nach Ihrer Bestellung fuer Sie gedruckt. Autor/Autorin: Friedenberg Stefanstudied math at the University of Duisburg-Essen. Since 2008 he is lecturer on algebra and geometry.Ext(A,B) carries a natural group structure and one of the striking problems in abelian group theory is to deter. Seller Inventory # 5406144
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Extensions of Abelian Groups: and Torsion-Free Pairs
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