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BP220 One cluster vs. two clusters.
(edit; present; nest [left/right]; search; history)
CROSSREFS

Adjacent-numbered pages:
BP215 BP216 BP217 BP218 BP219  *  BP221 BP222 BP223 BP224 BP225

KEYWORD

traditional

CONCEPT number (info | search),
feature_cluster (info | search),
cluster_of_one (info | search),
cluster (info | search),
one (info | search),
two (info | search)

AUTHOR

Giuseppe Insana

BP219 Parallel curves vs. non-parallel curves.
(edit; present; nest [left/right]; search; history)
CROSSREFS

Adjacent-numbered pages:
BP214 BP215 BP216 BP217 BP218  *  BP220 BP221 BP222 BP223 BP224

KEYWORD

traditional

CONCEPT all (info | search)

AUTHOR

Giuseppe Insana

BP218 Something is missing vs. an extra copy of something is added.
(edit; present; nest [left/right]; search; history)
COMMENTS

A generalization of Hofstadter's BP148.

CROSSREFS

Adjacent-numbered pages:
BP213 BP214 BP215 BP216 BP217  *  BP219 BP220 BP221 BP222 BP223

KEYWORD

nice, abstract, traditional

CONCEPT missing_part (info | search),
regular_irregular_change (info | search),
extra_part (info | search)

AUTHOR

Giuseppe Insana

BP217 Totally black lines vs. lines with white specks.
(edit; present; nest [left/right]; search; history)
CROSSREFS

Adjacent-numbered pages:
BP212 BP213 BP214 BP215 BP216  *  BP218 BP219 BP220 BP221 BP222

KEYWORD

perfect, pixelperfect

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

AUTHOR

Giuseppe Insana

BP216 Ink tip (non-homogeneous line) vs. Marker tip (homogeneous line).
(edit; present; nest [left/right]; search; history)
CROSSREFS

Adjacent-numbered pages:
BP211 BP212 BP213 BP214 BP215  *  BP217 BP218 BP219 BP220 BP221

KEYWORD

perfect

CONCEPT line_or_curve_endpoint (info | search),
curve_texture (info | search),
texture (info | search)

AUTHOR

Giuseppe Insana

BP215 Mouth concave upwards vs. Mouth convex upwards.
(edit; present; nest [left/right]; search; history)
CROSSREFS

Adjacent-numbered pages:
BP210 BP211 BP212 BP213 BP214  *  BP216 BP217 BP218 BP219 BP220

CONCEPT concave_convex_region (info | search),
downward_upward (info | search),
line_absolute_direction (info | search),
absolute_direction (info | search),
direction (info | search)

AUTHOR

Giuseppe Insana

BP214 Smiley face vs. not a smiley face.
(edit; present; nest [left/right]; search; history)
CROSSREFS

Adjacent-numbered pages:
BP209 BP210 BP211 BP212 BP213  *  BP215 BP216 BP217 BP218 BP219

KEYWORD

less, culture

CONCEPT specific_style (info | search),
specificity (info | search)

AUTHOR

Giuseppe Insana

BP213 The tightest-curved section, out of all sections of curve that make a complete turn (360 degrees), contains an x-crossing point vs. not so.
(edit; present; nest [left/right]; search; history)
COMMENTS

All examples are connected smooth curves allowed to self-intersect that must curve in only one direction (starting at one end, either clockwise or counter-clockwise), i.e. there is no inflection point.

CROSSREFS

Adjacent-numbered pages:
BP208 BP209 BP210 BP211 BP212  *  BP214 BP215 BP216 BP217 BP218

KEYWORD

less, convoluted, perfect, traditional

CONCEPT x-crossing (info | search)

AUTHOR

Giuseppe Insana

BP212 No dot is too far apart from another dot vs. at least one dot is far apart from all other dots.
(edit; present; nest [left/right]; search; history)
CROSSREFS

Adjacent-numbered pages:
BP207 BP208 BP209 BP210 BP211  *  BP213 BP214 BP215 BP216 BP217

KEYWORD

traditional

CONCEPT collinear (info | search),
near_far (info | search),
curve_texture (info | search),
texture (info | search)

AUTHOR

Giuseppe Insana

BP211 More black than white vs. more white than black.
(edit; present; nest [left/right]; search; history)
CROSSREFS

See BP196 for a version of this Problem restricted to uniform textures.

Adjacent-numbered pages:
BP206 BP207 BP208 BP209 BP210  *  BP212 BP213 BP214 BP215 BP216

KEYWORD

easy, nice, spectrum, dual, blackwhite, unstable, right-null, perfect, pixelperfect, traditional, continuous, viceversa, bordercontent

CONCEPT outlined_filled (info | search),
size (info | search),
texture (info | search)

WORLD

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

AUTHOR

Giuseppe Insana

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