K. R. Popper. On the theory of deduction, Part I. Derivation and its generalizations. Koninklijke Nederlandsche Akademie van Wetenschappen, Proceedings of the section of sciences, vol. 51 (1948), pp. 173–183; also Indagationes mathematicae, vol. 10 (1948), pp. 44–54. - K. R. Popper. On the theory of deduction, Part II. The definitions of classical and intuitionist negation. Koninklijke Nederlandsche Akademie van Wetenschappen, Proceedings of the section of sciences, vol. 51 (1948), pp. 322–331; also ibid., pp. 111–120. - K. R. Popper. The trivialization of mathematical logic. Library of the Xlh International Congress of Philosophy (Amsterdam, August 11–18, 1948). Vol. I. Proceedings of the Congress. Preprint 1948, pp. 510–515.

S. C. Kleene

doi:10.2307/2268996

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K. R. Popper. On the theory of deduction, Part I. Derivation and its generalizations. Koninklijke Nederlandsche Akademie van Wetenschappen, Proceedings of the section of sciences, vol. 51 (1948), pp. 173–183; also Indagationes mathematicae, vol. 10 (1948), pp. 44–54. - K. R. Popper. On the theory of deduction, Part II. The definitions of classical and intuitionist negation. Koninklijke Nederlandsche Akademie van Wetenschappen, Proceedings of the section of sciences, vol. 51 (1948), pp. 322–331; also ibid., pp. 111–120. - K. R. Popper. The trivialization of mathematical logic. Library of the Xlh International Congress of Philosophy (Amsterdam, August 11–18, 1948). Vol. I. Proceedings of the Congress. Preprint 1948, pp. 510–515.

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K. R. Popper. On the theory of deduction, Part I. Derivation and its generalizations. Koninklijke Nederlandsche Akademie van Wetenschappen, Proceedings of the section of sciences, vol. 51 (1948), pp. 173–183; also Indagationes mathematicae, vol. 10 (1948), pp. 44–54. - K. R. Popper. On the theory of deduction, Part II. The definitions of classical and intuitionist negation. Koninklijke Nederlandsche Akademie van Wetenschappen, Proceedings of the section of sciences, vol. 51 (1948), pp. 322–331; also ibid., pp. 111–120. - K. R. Popper. The trivialization of mathematical logic. Library of the Xlh International Congress of Philosophy (Amsterdam, August 11–18, 1948). Vol. I. Proceedings of the Congress. Preprint 1948, pp. 510–515.

To save this article to your Google Drive account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you used this feature, you will be asked to authorise Cambridge Core to connect with your Google Drive account. Find out more about saving content to Google Drive.

K. R. Popper. On the theory of deduction, Part I. Derivation and its generalizations. Koninklijke Nederlandsche Akademie van Wetenschappen, Proceedings of the section of sciences, vol. 51 (1948), pp. 173–183; also Indagationes mathematicae, vol. 10 (1948), pp. 44–54. - K. R. Popper. On the theory of deduction, Part II. The definitions of classical and intuitionist negation. Koninklijke Nederlandsche Akademie van Wetenschappen, Proceedings of the section of sciences, vol. 51 (1948), pp. 322–331; also ibid., pp. 111–120. - K. R. Popper. The trivialization of mathematical logic. Library of the Xlh International Congress of Philosophy (Amsterdam, August 11–18, 1948). Vol. I. Proceedings of the Congress. Preprint 1948, pp. 510–515.

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