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Displaying 1-3 of 3 results found.     page 1
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BP175 Small object can glide in the bay vs. small object cannot glide in the bay.
(edit; present; nest [left/right]; search; history)
CROSSREFS

Adjacent-numbered pages:
BP170 BP171 BP172 BP173 BP174  *  BP176 BP177 BP178 BP179 BP180

KEYWORD

orderedpair, traditional

CONCEPT entrance_exit (info | search),
indentation (info | search),
rotation_required (info | search),
imagined_motion (info | search),
motion (info | search),
specific_shape (info | search),
physically_fitting (info | search)

AUTHOR

Harry E. Foundalis

BP850 Shape can be maneuvered around the corner vs. not so.
(edit; present; nest [left/right]; search; history)
REFERENCE

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

CROSSREFS

Adjacent-numbered pages:
BP845 BP846 BP847 BP848 BP849  *  BP851 BP852 BP853 BP854 BP855

KEYWORD

nice, precise, physics, creativeexamples, proofsrequired, left-narrow, right-narrow, dithering

CONCEPT rotation_required (info | search),
imagined_motion (info | search),
physically_fitting (info | search)

AUTHOR

Leo Crabbe

BP892 Black shapes can be arranged such that they fit inside rectangular outline vs. not so.
?
(edit; present; nest [left/right]; search; history)
COMMENTS

There is a slight ambiguity here regarding whether a shape could be placed within another shape's hole. This is a question of how one perceives the Problem: are we sliding shapes around on a table in 2D or are we allowed to 'lift' them in 3D space?

CROSSREFS

Adjacent-numbered pages:
BP887 BP888 BP889 BP890 BP891  *  BP893 BP894 BP895 BP896 BP897

KEYWORD

nice, precise, perfect, pixelperfect, help

CONCEPT rotation_required (info | search),
physically_fitting (info | search)

AUTHOR

Leo Crabbe

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