Nɴ-free abelian group with no non-zero homomorphism to ℤ
Author
Shelah, Saharon
Abstract
We, far any natural 𝑛, construct an N𝑛-free abelian groups which have few homomorphisms to ℤ. For this we use "N𝑛-free (𝑛 + 1)-dimensional black boxes". The method is hopefully relevant to other constructions of N𝑛-free abelian groups.