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3 Author: Stefan Berghofer and Markus Wenzel, TU Muenchen |
3 Author: Stefan Berghofer and Markus Wenzel, TU Muenchen |
4 *) |
4 *) |
5 |
5 |
6 header {* Hilbert's choice and classical logic *} |
6 header {* Hilbert's choice and classical logic *} |
7 |
7 |
8 theory Hilbert_Classical = Main: |
8 theory Hilbert_Classical imports Main begin |
9 |
9 |
10 text {* |
10 text {* |
11 Derivation of the classical law of tertium-non-datur by means of |
11 Derivation of the classical law of tertium-non-datur by means of |
12 Hilbert's choice operator (due to M. J. Beeson and J. Harrison). |
12 Hilbert's choice operator (due to M. J. Beeson and J. Harrison). |
13 *} |
13 *} |