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Displaying 1-4 of 4 results found.     page 1
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BP382 No knot (unknot) vs. knot.
(edit; present; nest [left/right]; search; history)
COMMENTS

To hint at the solution, left examples can be arranged in a sequence to show the unknot tying itself.

CROSSREFS

Adjacent-numbered pages:
BP377 BP378 BP379 BP380 BP381  *  BP383 BP384 BP385 BP386 BP387

KEYWORD

nice, math, anticomputer, help, traditional

CONCEPT knot (info | search),
topological_transformation (info | search)

WORLD

knot [smaller | same | bigger]

AUTHOR

Aaron David Fairbanks

BP389 Loops are entangled (in 3-D) vs. loops can be separated (in 3-D).
(edit; present; nest [left/right]; search; history)
CROSSREFS

Adjacent-numbered pages:
BP384 BP385 BP386 BP387 BP388  *  BP390 BP391 BP392 BP393 BP394

KEYWORD

nice, precise, allsorted, contributepairs, traditional

CONCEPT knot (info | search),
topological_transformation (info | search),
imagined_motion (info | search),
motion (info | search)

WORLD

link_two_knots [smaller | same | bigger]

AUTHOR

Jago Collins

BP853 Prime knot vs. composite knot.
(edit; present; nest [left/right]; search; history)
REFERENCE

https://en.wikipedia.org/wiki/Prime_knot

CROSSREFS

Adjacent-numbered pages:
BP848 BP849 BP850 BP851 BP852  *  BP854 BP855 BP856 BP857 BP858

KEYWORD

math, hardsort

CONCEPT knot (info | search)

WORLD

knot [smaller | same | bigger]

AUTHOR

Aaron David Fairbanks

BP1136 The removal of any one loop disentangles the whole arrangement vs. not so.
(edit; present; nest [left/right]; search; history)
COMMENTS

Left-hand examples are called "Brunnian links".

REFERENCE

https://en.wikipedia.org/wiki/Brunnian_link

CROSSREFS

Adjacent-numbered pages:
BP1131 BP1132 BP1133 BP1134 BP1135  *  BP1137 BP1138 BP1139 BP1140 BP1141

KEYWORD

precise, hardsort

CONCEPT knot (info | search)

WORLD

link [smaller | same | bigger]

AUTHOR

Leo Crabbe

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