An addendum and corrigendum to "Almost free splitters" (Colloq. Math. 81 (1999), 193-221)
Rüdiger Göbel ; Saharon Shelah
Colloquium Mathematicae, Tome 89 (2001), p. 155-158 / Harvested from The Polish Digital Mathematics Library
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Let R be a subring of the rational numbers ℚ. We recall from [3] that an R-module G is a splitter if Ext¹R(G,G)=0. In this note we correct the statement of Main Theorem 1.5 in [3] and discuss the existence of non-free splitters of cardinality ℵ₁ under the negation of the special continuum hypothesis CH.

Publié le : 2001-01-01
EUDML-ID : urn:eudml:doc:283898 
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Rüdiger Göbel; Saharon Shelah. An addendum and corrigendum to "Almost free splitters" (Colloq. Math. 81 (1999), 193-221). Colloquium Mathematicae, Tome 89 (2001) pp. 155-158. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-doi-10_4064-cm88-1-11/