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-rw-r--r--src/algebra/catdef.spad.pamphlet2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/algebra/catdef.spad.pamphlet b/src/algebra/catdef.spad.pamphlet
index f16ebd14..d5992ab2 100644
--- a/src/algebra/catdef.spad.pamphlet
+++ b/src/algebra/catdef.spad.pamphlet
@@ -272,7 +272,7 @@ OrderedType(): Category == BasicType with
x > y == y < x
x <= y == not(y < x)
x >= y == not(x < y)
- x = y == not(x < y) and not(y < x)
+ x = y == not(x < y or y < x)
max(x,y) ==
x < y => y
x