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3 Copyright 1994 University of Cambridge |
3 Copyright 1994 University of Cambridge |
4 *) |
4 *) |
5 |
5 |
6 section \<open>Terms over an alphabet\<close> |
6 section \<open>Terms over an alphabet\<close> |
7 |
7 |
8 theory Term imports Main begin |
8 theory Term imports ZF begin |
9 |
9 |
10 text \<open> |
10 text \<open> |
11 Illustrates the list functor (essentially the same type as in \<open>Trees_Forest\<close>). |
11 Illustrates the list functor (essentially the same type as in \<open>Trees_Forest\<close>). |
12 \<close> |
12 \<close> |
13 |
13 |