On the p-rank of Ext

Details On the p-rank of Ext On the p-rank of Ext

1998-06-15

arxiv.org/abs/math/9806165v1

Mathematics

Logic

Scientific paper

Assume V=L and lambda is regular smaller than the first weakly compact
cardinal. Under those circumstances and with arbitrary requirements on the
structure of Ext(G,Z) (under well known limitations), we construct an abelian
group G of cardinality lambda such that for no G' subseteq G, |G'|< lambda is
G/G' free and Ext(G,Z) realizes our requirements.

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