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1998/04/27(15:56) from gumnuri.kookmin.ac.kr | |
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conch.gif
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A snapshot from an interactive sequence showing the deformation of a Mobius band with 3 half-twists into Ulrich Brehm's trefoil knotbox. (G. Chappell, G. Francis and C. Hartman, University of Illinois at Urbana-Champaign.) ZLzlaPtured DT |