Abstract.
We give a short proof of a theorem of Kanovei on separating induction and collection schemes for Σ n formulas using families of subsets of countable models of arithmetic coded in elementary end extensions.
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Mathematics Subject Classification (2000): 03C62
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Kossak, R. A note on a theorem of Kanovei. Arch. Math. Logic 43, 565–569 (2004). https://doi.org/10.1007/s00153-004-0218-2
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DOI: https://doi.org/10.1007/s00153-004-0218-2