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| author | dos-reis <gdr@axiomatics.org> | 2009-05-28 16:54:19 +0000 |
|---|---|---|
| committer | dos-reis <gdr@axiomatics.org> | 2009-05-28 16:54:19 +0000 |
| commit | 0e6d0cdde92747cc02d9965eef8ef1edc31cb1ae (patch) | |
| tree | f04d35a378e0426c93d7053c1461a5d348a73694 /src/algebra | |
| parent | e03459fc5fc739a3bfc612a32c041d052c68d063 (diff) | |
| download | open-axiom-0e6d0cdde92747cc02d9965eef8ef1edc31cb1ae.tar.gz | |
* algebra/boolean.spad.pamphlet (PropositionalLogic): Now export
`true' and `false'.
(Boolean): Ihenrit them.
Diffstat (limited to 'src/algebra')
| -rw-r--r-- | src/algebra/boolean.spad.pamphlet | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/src/algebra/boolean.spad.pamphlet b/src/algebra/boolean.spad.pamphlet index 0c9adbc6..f7cc1e9a 100644 --- a/src/algebra/boolean.spad.pamphlet +++ b/src/algebra/boolean.spad.pamphlet @@ -21,6 +21,10 @@ ++ Description: This category declares the connectives of ++ Propositional Logic. PropositionalLogic(): Category == SetCategory with + true: % + ++ true is a logical constant. + false: % + ++ false is a logical constant. not: % -> % ++ not p returns the logical negation of `p'. and: (%, %) -> % @@ -301,10 +305,6 @@ Logic: Category == BasicType with ++ true and false Boolean(): Join(OrderedFinite, Logic, PropositionalLogic, ConvertibleTo InputForm) with - true: % - ++ true is a logical constant. - false: % - ++ false is a logical constant. xor : (%, %) -> % ++ xor(a,b) returns the logical exclusive {\em or} ++ of Boolean \spad{a} and b. |