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arxiv: math/0011228 · v1 · submitted 2000-11-27 · 🧮 math.LO · math.RA

On Whitehead precovers

Paul C. Eklof , Saharon Shelah This is my paper
classification 🧮 math.LO math.RA
keywords everyperpprecoverprecoversprovedundecidablewhetherwhitehead
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It is proved undecidable in ZFC + GCH whether every Z-module has a^{perp} {Z}-precover.

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