Sh:402

• Shelah, S. (1999). Borel Whitehead groups. Math. Japon., 50(1), 121–130. arXiv: math/9809198 MR: 1710476
• Abstract:
  We investigate the Whiteheadness of Borel abelian groups (\aleph_1-free, wlog, as otherwise this is trivial). We show that CH (and even WCH) implies any such abelian group is free, and always \aleph_2-free.
• Version 1999-08-12_10 (14p)

@article{Sh:402,
 author = {Shelah, Saharon},
 title = {{Borel Whitehead groups}},
 journal = {Math. Japon.},
 fjournal = {Mathematica Japonica},
 volume = {50},
 number = {1},
 year = {1999},
 pages = {121--130},
 issn = {0025-5513},
 mrnumber = {1710476},
 mrclass = {03C60 (03E15 20K20)},
 note = {\href{https://arxiv.org/abs/math/9809198}{arXiv: math/9809198}},
 arxiv_number = {math/9809198}
}