The first almost free Whitehead group

Details The first almost free Whitehead group The first almost free Whitehead group

2007-08-15

arxiv.org/abs/0708.1980v3

Mathematics

Logic

Scientific paper

Assume G.C.H. and kappa is the first uncountable cardinal such that there is
a kappa-free abelian group which is not a Whitehead (abelian) group. We prove
that kappa is necessarily an inaccessible cardinal

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