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pro vyhledávání: '"STRÜNGMANN, LUTZ"'
Publikováno v:
In BioSystems September 2024 243
Publikováno v:
In BioSystems July 2023 229
It is known that every torsion-free abelian group of finite rank has a maximal completely decomposable summand that is unique up to isomorphism. We show that groups of infinite rank need not have maximal completely decomposable summands, but when the
Externí odkaz:
http://arxiv.org/abs/1810.09644
Publikováno v:
Forum Mathematicum; Nov2024, Vol. 36 Issue 6, p1613-1629, 17p
Autor:
Struengmann, Lutz, Shelah, Saharon
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.
Externí odkaz:
http://arxiv.org/abs/1401.5317
Autor:
Fimmel, Elena, Michel, Christian J., Pirot, François, Sereni, Jean-Sébastien, Strüngmann, Lutz
Publikováno v:
In Mathematical Biosciences November 2019 317