cross-cap
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cross-cap
[′krȯs ‚kap] (mathematics)
The self-intersecting surface that results when a Möbius band is deformed so that its boundary is a circle.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive
Both the cross-cap and the Klein bottle offer somewhat more complicated examples of nonorientable surfaces.
His "Torus with Cross-Cap and Vector Field" -- a 550-pound, gracefully textured and smoothly contoured sculpture in pure white marble -- stands at the headquarters of the American Mathematical Society in Providence, R.I.
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