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        Summary 
        The Borromean rings -- no two circles are directly linked, but the three are collectively interlinked. Cutting one ring frees the other two. In terms of knot theory, a  "Brunnian link".
        For a monochrome version of this graphic, see  File:Borromean-rings-BW.svg .
        For a version of the Borromean rings depicted in triangular form, see  Image:Valknut-Symbol-borromean.svg .
        For extended Borromean patterns, see  Image:Borromean-cross.png /  Image:Borromean-cross.svg and  Image:Borromean-chainmail-tile.png .
        For other (more complex) three-component Brunnian links which are not equivalent to the Borromean rings, see  Image:Brunnian-3-not-Borromean.png and  Image:Three-triang-18crossings-Brunnian.png .
        SVG version of  Image:Borromeanrings.png .
        Converted from the following PostScript code:
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