M. A. E. Dummett and E. J. Lemmon. Modal logics between S4 and S5. Zeitschrift für mathematische Logik und Grundlagen der Mathematik, vol. 5 (1959), pp. 250–264. - Iwao Nishimura. On formulas of one variable in intuitionistic propositional calculus. The journal of symbolic logic, vol. 25 No. 4 (for 1960, pub. 1962), pp. 327–331. - D. C. Makinson. There are infinitely many Diodorean modal functions. The journal of symbolic logic, vol. 31 (1966), pp. 406–408.

A. N. Prior

doi:10.2307/2270800

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M. A. E. Dummett and E. J. Lemmon. Modal logics between S4 and S5. Zeitschrift für mathematische Logik und Grundlagen der Mathematik, vol. 5 (1959), pp. 250–264. - Iwao Nishimura. On formulas of one variable in intuitionistic propositional calculus. The journal of symbolic logic, vol. 25 No. 4 (for 1960, pub. 1962), pp. 327–331. - D. C. Makinson. There are infinitely many Diodorean modal functions. The journal of symbolic logic, vol. 31 (1966), pp. 406–408.

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M. A. E. Dummett and E. J. Lemmon. Modal logics between S4 and S5. Zeitschrift für mathematische Logik und Grundlagen der Mathematik, vol. 5 (1959), pp. 250–264. - Iwao Nishimura. On formulas of one variable in intuitionistic propositional calculus. The journal of symbolic logic, vol. 25 No. 4 (for 1960, pub. 1962), pp. 327–331. - D. C. Makinson. There are infinitely many Diodorean modal functions. The journal of symbolic logic, vol. 31 (1966), pp. 406–408.

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.

M. A. E. Dummett and E. J. Lemmon. Modal logics between S4 and S5. Zeitschrift für mathematische Logik und Grundlagen der Mathematik, vol. 5 (1959), pp. 250–264. - Iwao Nishimura. On formulas of one variable in intuitionistic propositional calculus. The journal of symbolic logic, vol. 25 No. 4 (for 1960, pub. 1962), pp. 327–331. - D. C. Makinson. There are infinitely many Diodorean modal functions. The journal of symbolic logic, vol. 31 (1966), pp. 406–408.

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