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Whitehead problem


 

In group theory, the Whitehead problem is the following question:

References

  • S. Shelah: "Infinite Abelian groups, Whitehead problem and some constructions", Israel Journal of Mathematics 18 (1974), pp. 243-256.
  • S. Shelah: "Whitehead groups may not be free, even assuming CH. II", Israel Journal of Mathematics 35 (1980), pp. 257-285