NewEvery arXiv paper, its researchers & institutions — mapped.
paper

A solution to the Baer splitting problem

arXiv:math/0602272

Abstract

Let R be a commutative domain. We prove that an R-module B is projective if and only if Ext^1(B,T)=0 for any torsion module T. This answers in the affirmative a question raised by Kaplansky in 1962.