File:SurfacesWithAndWithoutBoundary.svg - 维基百科，自由的百科全书

描述SurfacesWithAndWithoutBoundary.svg	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.
日期	2010年12月26日, 18:34 (UTC)
来源	File:Simple Torus.svg File:Sphere wireframe 10deg 6r.svghttps://commons.wikimedia.org/wiki/File:SurfacesWithAndWithoutBoundary.svg
作者	File:Simple Torus.svg: YassineMrabet File:Sphere wireframe 10deg 6r.svg: Geek3 衍生作品 Sbyrnes321
SVG开发 InfoField	该SVG的源代码为有效代码。本矢量图使用Inkscape创作.

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File:Simple Torus.svg licensed with Cc-by-sa-3.0,2.5,2.0,1.0, GFDL
- 2007-11-23T21:20:42Z YassineMrabet 310x260 (25852 Bytes) {{Information |Description=A simple Torus. |Source=Own Work |Date=23-11-2007 |Author= [[User:YassineMrabet|YassineMrabet]] |Permission=GFDL, CC-BY-SA license (see below) |other_versions= }}

File:Sphere wireframe 10deg 6r.svg licensed with Cc-by-3.0, GFDL
- 2009-10-15T19:17:53Z Geek3 800x800 (41797 Bytes) Sphere_wireframe_10deg_6r.svg

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