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-rw-r--r--src/algebra/plot3d.spad.pamphlet2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/algebra/plot3d.spad.pamphlet b/src/algebra/plot3d.spad.pamphlet
index 804a1207..575498d5 100644
--- a/src/algebra/plot3d.spad.pamphlet
+++ b/src/algebra/plot3d.spad.pamphlet
@@ -218,7 +218,7 @@ Plot3D(): Exports == Implementation where
NUMFUNEVALS := NUMFUNEVALS + 1
t := c := reverse_! c; p := q := reverse_! q
s := (h-l)/(MINPOINTS::F-1)
- if (first t) ^= l then
+ if (first t) ~= l then
t := c := concat(l,c); p := q := concat(f l,p)
NUMFUNEVALS := NUMFUNEVALS + 1
while not null rest t repeat