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Search: ex:EX349
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BP30 A curve with one self-crossing vs. a curve without a self-crossing.
(edit; present; nest [left/right]; search; history)
REFERENCE

M. M. Bongard, Pattern Recognition, Spartan Books, 1970, p. 223.

CROSSREFS

BP1232 is almost exactly the same, but allowing for multiple curves and multiple self-crossings.

Adjacent-numbered pages:
BP25 BP26 BP27 BP28 BP29  *  BP31 BP32 BP33 BP34 BP35

KEYWORD

nice, finished, traditional, bongard

CONCEPT x-crossing (info | search),
existence (info | search)

WORLD

crosscurve [smaller | same | bigger]
zoom in right (curve_or_outline)

AUTHOR

Mikhail M. Bongard

BP1086 Endpoints of curve have the same height vs. not so.
(edit; present; nest [left/right]; search; history)
REFERENCE

Solution idea seen here: https://justpuzzles.wordpress.com/2019/07/05/bongard-problem-36-2.

CROSSREFS

Adjacent-numbered pages:
BP1081 BP1082 BP1083 BP1084 BP1085  *  BP1087 BP1088 BP1089 BP1090 BP1091

KEYWORD

nice, rotate, stretch, left-narrow, traditional

CONCEPT same (info | search)

WORLD

[smaller | same | bigger]

AUTHOR

Teun Spaans

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