JournalspmVol. 77, No. 3/4pp. 399–408

Weak König’s lemma in herbrandized classical second-order arithmetic

  • Fernando Ferreira

    Universidade de Lisboa, Portugal
Weak König’s lemma in herbrandized classical second-order arithmetic cover
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Abstract

This is a short paper describing how a herbrandized functional interpretation can give a new treatment of some issues in classical second-order arithmetic. It is perhaps worthy of note that, in our interpretation, second-order variables are interpreted by finite sets of natural numbers.

Cite this article

Fernando Ferreira, Weak König’s lemma in herbrandized classical second-order arithmetic. Port. Math. 77 (2020), no. 3/4, pp. 399–408

DOI 10.4171/PM/2056