File:Cube retraction.svg
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![File:Cube retraction.svg](http://upload.wikimedia.org/wikipedia/commons/thumb/c/c3/Cube_retraction.svg/153px-Cube_retraction.svg.png)
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 02:13, 17 April 2008 | ![]() | 153 × 135 (2 KB) | David Eppstein | {{Information |Description=The retraction of a cube onto one of its subgraphs, one of the characterizations of median graphs |Source=self-made |Date= |Author= David Eppstein |Permission={{PD-self}} |other_versi |
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