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3 Copyright 1993 University of Cambridge |
3 Copyright 1993 University of Cambridge |
4 *) |
4 *) |
5 |
5 |
6 section \<open>Meta-theory of propositional logic\<close> |
6 section \<open>Meta-theory of propositional logic\<close> |
7 |
7 |
8 theory PropLog imports Main begin |
8 theory PropLog imports ZF begin |
9 |
9 |
10 text \<open> |
10 text \<open> |
11 Datatype definition of propositional logic formulae and inductive |
11 Datatype definition of propositional logic formulae and inductive |
12 definition of the propositional tautologies. |
12 definition of the propositional tautologies. |
13 |
13 |