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BP847 Evokes the idea of symmetry vs. not so.
(edit; present; nest [left/right]; search; history)
COMMENTS

Or, perhaps more concretely, "Depiction of object with some symmetry (invariance under transformation) vs. depiction of object with no simple symmetries."

CROSSREFS

Adjacent-numbered pages:
BP842 BP843 BP844 BP845 BP846  *  BP848 BP849 BP850 BP851 BP852

KEYWORD

nice, fuzzy, abstract, math, concept, collective, dithering

CONCEPT symmetry (info | search)

AUTHOR

Leo Crabbe

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

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

BP1175 Each symbol appears once in any given row or column vs. not so.
(edit; present; nest [left/right]; search; history)
REFERENCE

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

CROSSREFS

Adjacent-numbered pages:
BP1170 BP1171 BP1172 BP1173 BP1174  *  BP1176 BP1177 BP1178 BP1179 BP1180

KEYWORD

precise, traditional, grid, miniworlds, dithering

AUTHOR

Leo Crabbe

BP1184 Polygon enclosed in smallest possible circle vs. not so.
(edit; present; nest [left/right]; search; history)
COMMENTS

Intuitively, if one imagines shaking the circles in each example, the polygons in right-sorted examples could be imagined to "rattle around".

CROSSREFS

Adjacent-numbered pages:
BP1179 BP1180 BP1181 BP1182 BP1183  *  BP1185 BP1186 BP1187 BP1188 BP1189

KEYWORD

precise, allsorted, dithering

AUTHOR

Leo Crabbe

BP1191 One natural way of matching up the two collections vs. multiple natural ways of matching up the two collections.
?
?
?
(edit; present; nest [left/right]; search; history)
COMMENTS

Jago originally designed this as a triptych. EX9655, EX9656, and EX9657 belong in a third category displayed further right of the two categories shown here. The third category is "all possible ways of matching are equally natural". - Aaron David Fairbanks, Apr 18 2022

CROSSREFS

Adjacent-numbered pages:
BP1186 BP1187 BP1188 BP1189 BP1190  *  BP1192 BP1193 BP1194 BP1195 BP1196

KEYWORD

nice, abstract, creativeexamples, structure, miniworlds, dithering

AUTHOR

Jago Collins

BP1197 No sequence is repeated twice in a row vs. some sequence is repeated twice in a row.
(edit; present; nest [left/right]; search; history)
REFERENCE

https://en.wikipedia.org/wiki/Square-free_word

CROSSREFS

Adjacent-numbered pages:
BP1192 BP1193 BP1194 BP1195 BP1196  *  BP1198 BP1199 BP1200 BP1201 BP1202

KEYWORD

precise, allsorted, notso, left-narrow, sequence, traditional, preciseworld, dithering, left-listable

CONCEPT two (info | search)

AUTHOR

Aaron David Fairbanks

BP1224 Grey shape present vs. not.
(edit; present; nest [left/right]; search; history)
CROSSREFS

Adjacent-numbered pages:
BP1219 BP1220 BP1221 BP1222 BP1223  *  BP1225 BP1226 BP1227 BP1228 BP1229

KEYWORD

stub, notso, dithering

CONCEPT existence (info | search),
texture (info | search)

AUTHOR

Aaron David Fairbanks

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