I, the copyright holder of this work, hereby publish it under the following licenses:
This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. This library is distributed in the hope that it will be useful, but without any warranty; without even the implied warranty of merchantability or fitness for a particular purpose. See version 2.1 and version 3 of the GNU Lesser General Public License for more details. http://www.gnu.org/licenses/lgpl.htmlLGPLGNU Lesser General Public Licensetruetrue
Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled GNU Free Documentation License.http://www.gnu.org/copyleft/fdl.htmlGFDLGNU Free Documentation Licensetruetrue
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share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.
== Summary == == Summary == Clean up of code and image. Original PNG created by en:User:Tarquin. GFDL|migration=relicense First SVG version by User:RTCNCA GFDL / Cc-by-sa-3.0 SVG cleanup by User:Boivie. No license claim for cleanup
{{Information |Description=A necker cube and the equivalent showing a flat-edge crossing the other, which is impossible in 3-dimensional space, it's an optical illusion |Source={{Inkscape}} |Date=2008-12-28 |Author=Uploader |Permission=See Below |other_ve