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Search: supworld:nothing
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BP280 The left part is wider than the right part vs. the left part is narrower than the right part.
(edit; present; nest [left/right]; search; history)
CROSSREFS

Adjacent-numbered pages:
BP275 BP276 BP277 BP278 BP279  *  BP281 BP282 BP283 BP284 BP285

CONCEPT convex_hull (info | search),
horizontal (info | search),
left_right (info | search),
length_line_or_curve (info | search),
imagined_line_or_curve (info | search),
imagined_entity (info | search),
vertical (info | search)

WORLD

arial_font_two_symbols [smaller | same | bigger]

AUTHOR

Merse E. Gáspár

BP281 Equal number of horizontal and vertical lines vs. unequal number of horizontal and vertical lines.
(edit; present; nest [left/right]; search; history)
CROSSREFS

Adjacent-numbered pages:
BP276 BP277 BP278 BP279 BP280  *  BP282 BP283 BP284 BP285 BP286

KEYWORD

traditional

CONCEPT horizontal (info | search),
number (info | search),
same_number (info | search),
same (info | search),
vertical (info | search)

WORLD

segments_cross [smaller | same | bigger]

AUTHOR

Sang-Joon Yoon

BP299 Lines if slightly extended make up a regular polygon vs. lines if slightly extended cannot make up a regular polygon.
(edit; present; nest [left/right]; search; history)
CROSSREFS

Adjacent-numbered pages:
BP294 BP295 BP296 BP297 BP298  *  BP300 BP301 BP302 BP303 BP304

KEYWORD

traditional

CONCEPT imperfection_small (info | search)

WORLD

segments [smaller | same | bigger]

AUTHOR

"Lewis"

BP318 The numbers of dots can be put into a sequence of consecutive numbers vs. not so.
(edit; present; nest [left/right]; search; history)
CROSSREFS

Adjacent-numbered pages:
BP313 BP314 BP315 BP316 BP317  *  BP319 BP320 BP321 BP322 BP323

KEYWORD

nice, traditional

CONCEPT size_increase_decrease (info | search),
iteration (info | search),
number (info | search),
ordinal_orering (info | search),
dot (info | search),
sequence (info | search)

WORLD

dot_clusters [smaller | same | bigger]

AUTHOR

Aaron David Fairbanks

BP322 One outer outline vs. more than one outer outline.
(edit; present; nest [left/right]; search; history)
CROSSREFS

Adjacent-numbered pages:
BP317 BP318 BP319 BP320 BP321  *  BP323 BP324 BP325 BP326 BP327

KEYWORD

nice, precise, allsorted, traditional

CONCEPT separated_regions (info | search),
interior_exterior (info | search),
outer_outline (info | search),
recursion (info | search),
one (info | search)

WORLD

nest_shapes [smaller | same | bigger]

AUTHOR

Aaron David Fairbanks

BP334 Odd number of dots vs. even number of dots.
(edit; present; nest [left/right]; search; history)
CROSSREFS

See BP334 for a version of the same idea, but using arbitrary shapes instead of dots.

Adjacent-numbered pages:
BP329 BP330 BP331 BP332 BP333  *  BP335 BP336 BP337 BP338 BP339

KEYWORD

precise, allsorted, number, math, left-narrow, right-narrow, right-null, help, traditional, preciseworld

CONCEPT even_odd (info | search)

WORLD

dots [smaller | same | bigger]

AUTHOR

Aaron David Fairbanks

BP335 Tessellates the plane vs. does not tessellate the plane.
(edit; present; nest [left/right]; search; history)
COMMENTS

EX7152 is an example of a shape than can be stretched in such a way that it no longer tessellates the plane. This is a property that is only exhibited by shapes that tessellate with rotated copies of themselves. - Leo Crabbe, Mar 05 2021

CROSSREFS

Adjacent-numbered pages:
BP330 BP331 BP332 BP333 BP334  *  BP336 BP337 BP338 BP339 BP340

KEYWORD

nice, stretch, unstable, math, hardsort, creativeexamples, proofsrequired, perfect, pixelperfect, traditional

CONCEPT infinite_plane (info | search),
tessellation (info | search),
tiling (info | search)

WORLD

shape [smaller | same | bigger]
zoom in left (fill_shape)

AUTHOR

Aaron David Fairbanks

BP336 Any one gear turns all vs. no gear turns all.
(edit; present; nest [left/right]; search; history)
CROSSREFS

See BP536 for all gears can turn.

Adjacent-numbered pages:
BP331 BP332 BP333 BP334 BP335  *  BP337 BP338 BP339 BP340 BP341

KEYWORD

nice, stretch, physics, traditional

CONCEPT all (info | search),
turn_orientation (info | search),
every_other (info | search),
gear (info | search),
on_line_or_curve (info | search),
tracing_line_or_curve (info | search),
imagined_motion (info | search),
motion (info | search)

WORLD

gears [smaller | same | bigger]
zoom in left | zoom in right

AUTHOR

Aaron David Fairbanks

BP340 Regular star polygon vs. not so.
(edit; present; nest [left/right]; search; history)
CROSSREFS

Adjacent-numbered pages:
BP335 BP336 BP337 BP338 BP339  *  BP341 BP342 BP343 BP344 BP345

KEYWORD

math, traditional

CONCEPT tracing_line_or_curve (info | search),
vertex_of_meeting_lines (info | search),
write_in_single_stroke (info | search)

WORLD

figure_made_of_segments [smaller | same | bigger]

AUTHOR

Aaron David Fairbanks

BP342 Exactly one axis of symmetry vs. either zero or more than one axis of symmetry.
(edit; present; nest [left/right]; search; history)
CROSSREFS

Adjacent-numbered pages:
BP337 BP338 BP339 BP340 BP341  *  BP343 BP344 BP345 BP346 BP347

KEYWORD

traditional, finishedexamples

CONCEPT exists_one (info | search),
imagined_line_or_curve (info | search),
imagined_entity (info | search),
symmetry_axis (info | search),
symmetry (info | search)

WORLD

shape_outline [smaller | same | bigger]

AUTHOR

Aaron David Fairbanks

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