On the p-rank of Ext(A,B) for countable abelian groups A and B
arXiv:1401.5317
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.
arXiv:1401.5317
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.