File:SurfacesWithAndWithoutBoundary.svg
From Infogalactic: the planetary knowledge core
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Summary
Some surfaces without boundary (left) and with boundary (right). (Also called closed surfaces and open surfaces, respectively.) Left: Surface of a sphere, surface of a torus, surface of a cube. Right: Disk surface, square surface, surface of a hemisphere. The surface is blue, the boundary is red.
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File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 15:00, 4 January 2017 | | 634 × 696 (271 KB) | 127.0.0.1 (talk) | <p>Some surfaces without boundary (left) and with boundary (right). (Also called closed surfaces and open surfaces, respectively.) Left: Surface of a sphere, surface of a torus, surface of a cube. Right: Disk surface, square surface, surface of a hemisphere. The surface is blue, the boundary is red. </p> |
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