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-rw-r--r--src/algebra/space.spad.pamphlet2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/algebra/space.spad.pamphlet b/src/algebra/space.spad.pamphlet
index 6d688e47..60d4a13e 100644
--- a/src/algebra/space.spad.pamphlet
+++ b/src/algebra/space.spad.pamphlet
@@ -616,7 +616,7 @@ ThreeSpace(R:Ring):Exports == Implementation where
numCurves := numCurves + 1
(#kid = 2) and _
(#children first kid = 1) and _
- (#children first rest kid ~= 1) =>
+ not one?(#children first rest kid) =>
numPolys := numPolys + 1
numConstructs := numConstructs + 1
-- otherwise, a mathematical surface is assumed