Quelle: Wikimedia Commons
Symbol for playing card suit clubs.
Date: 15 October 2007
Source: Own work
◦ Author: F l a n k e r
This image of simple geometry is ineligible for copyright and therefore in the public domain, because it consists entirely of information that is common property and contains no original authorship. This work has been released into the public domain by its author, F l a n k e r. This applies worldwide. In some countries this may not be legally possible; if so: F l a n k e r grants anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.
◦ Das Bild ist Teil eines online-Lexikons.
◦ WH54 Fachwort-Lexikon Mathematik, Aachen:
◦ Siehe unter => Karo