p126

pi-base · Feb 8, 2025 · 3824bfb · 3824bfb
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commit 3824bfb
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diff --git a/spaces/S000086/properties/P000126.md b/spaces/S000086/properties/P000126.md
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+---
+space: S000086
+property: P000126
+value: false
+---
+
+The set $[0,1]\times\{0\}$ is neither closed (closure contains "doubled" points) nor open (ends are not in the interior).