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Omitting Types: Application to Descriptive Set Theory
Proceedings of the American Mathematical Society
Vol. 47, No. 1 (Jan., 1975), pp. 198-200
Published by: American Mathematical Society
Stable URL: http://www.jstor.org/stable/2040232
Page Count: 3
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The omitting types theorem of infinitary logic is used to prove that every small Π1 1 set of analysis or any small Σ1 set of set theory is constructible.
Proceedings of the American Mathematical Society © 1975 American Mathematical Society