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We give alternative proofs of results due to J. B. Paris and A. J. Wilkie concerning the existence of end extensions of countable models of the theory of Sigma_1 collection.
This page is a summary of: End Extensions of Models of Weak Arithmetic Theories, Notre Dame Journal of Formal Logic, January 2016, Duke University Press,
DOI: 10.1215/00294527-3452693.
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