An algebraic <a href="https://en.wikipedia.org/wiki/Link_diagram" class="extiw" title="en:Link diagram">link diagram</a> for the <a href="https://en.wikipedia.org/wiki/Borromean_rings" class="extiw" title="en:Borromean rings">Borromean rings</a>. The vertical black dotted midline shows a <a href="https://en.wikipedia.org/wiki/Conway_sphere" class="extiw" title="en:Conway sphere">Conway sphere</a> dividing the diagram into two <a href="https://en.wikipedia.org/wiki/Tangle_(mathematics)" class="extiw" title="en:Tangle (mathematics)">2-tangles</a>, showing that the Borromean rings are an <a href="https://en.wikipedia.org/wiki/Algebraic_link" class="extiw" title="en:Algebraic link">algebraic link</a>.
<a href="//commons.wikimedia.org/wiki/User:David_Eppstein" class="mw-redirect" title="User:David Eppstein">David Eppstein</a>
<span class="int-own-work" lang="en">Own work</span>