This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Closedfivelinkchainknots.svg Various decorative depictions of the La link of mathematical knot theory closed link chain including interlinked circles and pentagons and interlaced yinyang type shapes Selfmade graphic converted from version of the following vector PostScript source code gsave translate dup scale setlinewidth