| author | wenzelm |
| Sat, 01 Jun 2019 11:29:59 +0200 | |
| changeset 70299 | 83774d669b51 |
| parent 67406 | 23307fd33906 |
| child 80914 | d97fdabd9e2b |
| permissions | -rw-r--r-- |
| 8745 | 1 |
(*<*) |
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theory fakenat imports Main begin |
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(*>*) |
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text\<open>\noindent |
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The type \tydx{nat} of natural
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56260
3d79c132e657
modernized approximation, avoiding bad name binding;
wenzelm
parents:
48985
diff
changeset
|
7 |
numbers is predefined to have the constructors \cdx{0} and~\cdx{Suc}.
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3d79c132e657
modernized approximation, avoiding bad name binding;
wenzelm
parents:
48985
diff
changeset
|
8 |
It behaves approximately as if it were declared like this: |
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\<close> |
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56260
3d79c132e657
modernized approximation, avoiding bad name binding;
wenzelm
parents:
48985
diff
changeset
|
11 |
datatype nat = zero ("0") | Suc nat
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(*<*) |
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end |
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(*>*) |