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BP52 Arrows pointing in different directions vs. arrows pointing in the same direction.
(edit; present; nest [left/right]; search; history)
REFERENCE

M. M. Bongard, Pattern Recognition, Spartan Books, 1970, p. 231.

CROSSREFS

Adjacent-numbered pages:
BP47 BP48 BP49 BP50 BP51  *  BP53 BP54 BP55 BP56 BP57

KEYWORD

finished, traditional, bongard

CONCEPT arrow (info | search),
tracing_lines_or_curves_meet (info | search),
pointing_to (info | search),
tracing_line_or_curve (info | search),
imagined_point (info | search),
imagined_entity (info | search)

AUTHOR

Mikhail M. Bongard

BP102 Internal arrows point outward vs. internal arrows point inward.
(edit; present; nest [left/right]; search; history)
CROSSREFS

Adjacent-numbered pages:
BP97 BP98 BP99 BP100 BP101  *  BP103 BP104 BP105 BP106 BP107

KEYWORD

traditional

CONCEPT arrow (info | search),
between (info | search),
tracing_lines_or_curves_meet (info | search),
tracing_line_or_curve (info | search),
imagined_point (info | search),
imagined_entity (info | search)

AUTHOR

Douglas R. Hofstadter

BP118 No cycle vs. a cycle exists.
(edit; present; nest [left/right]; search; history)
CROSSREFS

Adjacent-numbered pages:
BP113 BP114 BP115 BP116 BP117  *  BP119 BP120 BP121 BP122 BP123

KEYWORD

traditional

CONCEPT arrow (info | search),
cyclic_path (info | search),
existence (info | search),
path (info | search)

AUTHOR

Douglas R. Hofstadter

BP358 The circles will collide if the arrows are their velocities vs. the circles will not collide if the arrows are their velocities.
(edit; present; nest [left/right]; search; history)
CROSSREFS

Adjacent-numbered pages:
BP353 BP354 BP355 BP356 BP357  *  BP359 BP360 BP361 BP362 BP363

KEYWORD

nice, physics, unorderedpair, traditional

CONCEPT arrow (info | search),
tracing_lines_or_curves_meet (info | search),
speed (info | search),
imagined_line_or_curve (info | search),
imagined_entity (info | search),
imagined_motion (info | search),
motion (info | search),
collision (info | search)

AUTHOR

Aaron David Fairbanks

BP363 Counterclockwise along the curve following the arrow vs. clockwise along the curve following the arrow.
(edit; present; nest [left/right]; search; history)
CROSSREFS

Adjacent-numbered pages:
BP358 BP359 BP360 BP361 BP362  *  BP364 BP365 BP366 BP367 BP368

KEYWORD

easy, nice, dual, handed, leftright, updown, gap, traditional

CONCEPT arrow (info | search),
turn_orientation (info | search),
tracing_line_or_curve (info | search)

AUTHOR

Aaron David Fairbanks

BP1256 Arrows which if moved at speeds proportional to their length would pass eachother vs. not so
(edit; present; nest [left/right]; search; history)
CROSSREFS

Adjacent-numbered pages:
BP1251 BP1252 BP1253 BP1254 BP1255  *  BP1257 BP1258 BP1259 BP1260 BP1261

KEYWORD

precise, physics, unorderedpair, traditional

CONCEPT arrow (info | search)

AUTHOR

Matt Samuels

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