| http://www.w3.org/ns/prov#value | - A loop which is semicircular in the back plane but with a small twist in the bottom plane will look like a cusp at certain viewing anglesCusps To use any of the clipart images above including the thumbnail image in the top left corner just click and drag the picture to your desktop You may also control click Mac or right click20080820 053 jpgcuspsmall pngSources photos from Ruhr University Osman H
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