On the p-rank of Ext(A,B) for countable abelian groups A and B

Saharon Shelah; Lutz Strüngmann

doi:10.1007/s11856-013-0039-2

On the p-rank of Ext(A,B) for countable abelian groups A and B

Saharon Shelah^*
, Lutz Strüngmann

^*Corresponding author for this work

Einstein Institute of Mathematics

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Abstract

In this note we show that the p-rank of Ext(A,B) for countable torsion-free abelian groups A and B is either countable or the size of the continuum.

Original language	English
Pages (from-to)	567-572
Number of pages	6
Journal	Israel Journal of Mathematics
Volume	199
Issue number	2
DOIs	https://doi.org/10.1007/s11856-013-0039-2
State	Published - 1 Mar 2014

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Publisher Copyright:
© 2014, Hebrew University Magnes Press.

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10.1007/s11856-013-0039-2

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abstract = "In this note we show that the p-rank of Ext(A,B) for countable torsion-free abelian groups A and B is either countable or the size of the continuum.",

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On the p-rank of Ext(A,B) for countable abelian groups A and B

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