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March 13, 2009
"In a knot of eight crossings, which is about the average-size knot,
there are 256 different 'over-and-under' arrangements possible. . . . Make only one change in this 'over and under' sequence and either an entirely different knot is made
or no knot at all may result."
觀看全文...
there are 256 different 'over-and-under' arrangements possible. . . . Make only one change in this 'over and under' sequence and either an entirely different knot is made
or no knot at all may result."
觀看全文...
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