On a non-vanishing Ext
by Fuchs and Shelah. [FuSh:766]
Rend. Sem. Mat. Univ. Padova, 2003
The existence of valuation domains admitting non-standard
uniserial modules for which certain Exts do not vanish was proved
under Jensen's Diamond Principle. In this note, the same is verified
using the ZFC axioms alone.
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