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BP277 One object vs. two or more objects.
(edit; present; nest [left/right]; search; history)
CROSSREFS

Adjacent-numbered pages:
BP272 BP273 BP274 BP275 BP276  *  BP278 BP279 BP280 BP281 BP282

KEYWORD

number

CONCEPT number (info | search)

WORLD

arial_font_symbols [smaller | same | bigger]

AUTHOR

Merse E. Gáspár

BP527 Each black filled circle belongs to exactly one large circle outline vs. not so.
(edit; present; nest [left/right]; search; history)
COMMENTS

On the left, circles define a partition of the dots.

CROSSREFS

Adjacent-numbered pages:
BP522 BP523 BP524 BP525 BP526  *  BP528 BP529 BP530 BP531 BP532

KEYWORD

precise, allsorted, traditional

CONCEPT circle (info | search),
exists_one (info | search)

AUTHOR

Aaron David Fairbanks

BP1120 No same-sized copies of self overlap vs. distinct same-sized copies overlap.
(edit; present; nest [left/right]; search; history)
COMMENTS

With mathematical jargon:

No distinct same-sized copies of self overlap on a subset with positive measure in the Hausdorff measure using the Hausdorff dimension.


For a covering of a fractal by finitely many scaled down copies of itself, the condition of that no two have an intersection with positive measure is equivalent to the condition that the Hausdorff dimension coincides with the similarity dimension.

(There is another similar condition in this context called the "open set condition" which implies this but is not equivalent. The open set condition is equivalent to the condition that the Hausdorff measure using the similarity dimension is nonzero.)

REFERENCE

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

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

CROSSREFS

Adjacent-numbered pages:
BP1115 BP1116 BP1117 BP1118 BP1119  *  BP1121 BP1122 BP1123 BP1124 BP1125

KEYWORD

challenge, perfect, infinitedetail

CONCEPT fractal (info | search),
recursion (info | search),
self-reference (info | search),
overlap (info | search)

WORLD

[smaller | same | bigger]

AUTHOR

Aaron David Fairbanks

BP1215 Axis of symmetry along the NW/SE diagonal vs. not.
(edit; present; nest [left/right]; search; history)
CROSSREFS

BP1206 is the same solution but with the vertical axis instead of the NW/SE diagonal.

BP1207 is the same solution but with the horizontal axis instead of the NW/SE diagonal.

Adjacent-numbered pages:
BP1210 BP1211 BP1212 BP1213 BP1214  *  BP1216 BP1217 BP1218 BP1219 BP1220

KEYWORD

stub, notso, handed, leftright, updown, rotate, left-narrow, traditional

CONCEPT diagonal (info | search),
symmetry_axis (info | search),
symmetry (info | search)

AUTHOR

Aaron David Fairbanks

BP268 Convex hull elongated vertically vs. convex hull elongated horizontally.
(edit; present; nest [left/right]; search; history)
CROSSREFS

Adjacent-numbered pages:
BP263 BP264 BP265 BP266 BP267  *  BP269 BP270 BP271 BP272 BP273

CONCEPT convex_hull (info | search),
elongated_compact (info | search),
horizontal (info | search),
vertical (info | search)

WORLD

arial_font_symbols [smaller | same | bigger]

AUTHOR

Merse E. Gáspár

BP1052 More than twice as many of one color than the other vs. neither color exceeds double the other.
(edit; present; nest [left/right]; search; history)
CROSSREFS

See the twin BP1047.

Adjacent-numbered pages:
BP1047 BP1048 BP1049 BP1050 BP1051  *  BP1053 BP1054 BP1055 BP1056 BP1057

KEYWORD

precise, allsorted, preciseworld

CONCEPT ratio (info | search)

WORLD

outline_or_fill_circles_same_size [smaller | same | bigger]

AUTHOR

Aaron David Fairbanks

BP329 Regular polygon vs. not regular polygon.
(edit; present; nest [left/right]; search; history)
CROSSREFS

Adjacent-numbered pages:
BP324 BP325 BP326 BP327 BP328  *  BP330 BP331 BP332 BP333 BP334

KEYWORD

precise, allsorted, stretch, traditional, finishedexamples, preciseworld

CONCEPT angle (info | search),
same_feature (info | search),
same (info | search)

WORLD

polygon_outline [smaller | same | bigger]

AUTHOR

Aaron David Fairbanks

BP548 Due to pixelation, it is ambiguous whether the middle small shape is a resized version of the left shape or the right shape vs. there is a clear choice.
(edit; present; nest [left/right]; search; history)
COMMENTS

A strange Problem relying on pixelation of digital images.

CROSSREFS

Adjacent-numbered pages:
BP543 BP544 BP545 BP546 BP547  *  BP549 BP550 BP551 BP552 BP553

KEYWORD

creativeexamples, pixelperfect, structure, orderedtriplet, experimental

CONCEPT imperfection_small (info | search)

WORLD

[smaller | same | bigger]

AUTHOR

Aaron David Fairbanks

BP1110 The process that turns one object into the other is the same both ways vs. the process changes depending on which object is chosen as the starting point.
?
(edit; present; nest [left/right]; search; history)
REFERENCE

https://en.wikipedia.org/wiki/Duality_(mathematics)

https://en.wikipedia.org/wiki/Involution_(mathematics)

CROSSREFS

This is a special case of BP841 and a generalisation of BP822.

Adjacent-numbered pages:
BP1105 BP1106 BP1107 BP1108 BP1109  *  BP1111 BP1112 BP1113 BP1114 BP1115

KEYWORD

nice, abstract, math, anticomputer, creativeexamples, left-narrow, unorderedpair, rules, miniworlds, dithering

CONCEPT function (info | search)

AUTHOR

Leo Crabbe

BP330 1-D curve vs. 2-D shape.
(edit; present; nest [left/right]; search; history)
CROSSREFS

Adjacent-numbered pages:
BP325 BP326 BP327 BP328 BP329  *  BP331 BP332 BP333 BP334 BP335

KEYWORD

traditional

CONCEPT dimensionality (info | search)

AUTHOR

Aaron David Fairbanks

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