The On-Line Encyclopedia of Bongard Problems

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There are no side branches of the second order vs. there are side branches of the second order.

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	REFERENCE	`M. M. Bongard, Pattern Recognition, Spartan Books, 1970, p. 237.`
	CROSSREFS	`Adjacent-numbered pages: BP65 BP66 BP67 BP68 BP69 * BP71 BP72 BP73 BP74 BP75`
	KEYWORD	`nice, finished, traditional, bongard`
	CONCEPT	`recursion_number (info \| search),` `recursion (info \| search),` `tracing_line_or_curve (info \| search),` `trunk_of_tree (info \| search),` `two (info \| search)`
	WORLD	`curve_tree [smaller \| same \| bigger] zoom in left (curve_tree_one_level)`
	AUTHOR	`Mikhail M. Bongard`

There are inside figures of the second order vs. there are no inside figures of the second order.

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	REFERENCE	`M. M. Bongard, Pattern Recognition, Spartan Books, 1970, p. 237.`
	CROSSREFS	`See BP1022 for a Problem about presence of nesting.` `Adjacent-numbered pages: BP66 BP67 BP68 BP69 BP70 * BP72 BP73 BP74 BP75 BP76`
	KEYWORD	`nice, finished, traditional, bongard`
	CONCEPT	`recursion_number (info \| search),` `inside (info \| search),` `recursion (info \| search),` `two (info \| search)`
	WORLD	`[smaller \| same \| bigger]`
	AUTHOR	`Mikhail M. Bongard`

Concave shapes with concave cavities vs. convex cavities

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	COMMENTS	`All examples in this Problem are solid concave black shapes. In this Problem, the "cavities" of a concave shape are defined to be the convex hull of the shape minus the shape itself. For example, if you take a bite out of the edge of a piece of paper, the piece of paper in your mouth is the cavity of the bitten piece of paper. The idea may be indefinitely extended, considering whether the cavities of the cavities are concave or convex, and so on.`
	CROSSREFS	`Adjacent-numbered pages: BP987 BP988 BP989 BP990 BP991 * BP993 BP994 BP995 BP996 BP997`
	KEYWORD	`nice, precise, perfect, traditional`
	CONCEPT	`recursion_number (info \| search),` `recursion (info \| search)`
	WORLD	`concave_fill_shape [smaller \| same \| bigger]`
	AUTHOR	`Jago Collins`

White space in two circles maximum vs. white space in three circles maximum.

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	CROSSREFS	`Adjacent-numbered pages: BP1014 BP1015 BP1016 BP1017 BP1018 * BP1020 BP1021 BP1022 BP1023 BP1024`
	KEYWORD	`nice, precise, traditional`
	CONCEPT	`recursion_number (info \| search),` `separated_regions (info \| search),` `circle (info \| search),` `recursion (info \| search),` `two (info \| search),` `three (info \| search)`
	WORLD	`circles_cross [smaller \| same \| bigger]`
	AUTHOR	`Aaron David Fairbanks`

Nesting vs. no nesting.

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	CROSSREFS	`See BP1061 for a version of this with only squares and which allows infinite nesting.` `See BP71 for a Problem about counting levels of nesting.` `Adjacent-numbered pages: BP1017 BP1018 BP1019 BP1020 BP1021 * BP1023 BP1024 BP1025 BP1026 BP1027`
	KEYWORD	`easy, nice, precise, allsorted, traditional`
	CONCEPT	`recursion_number (info \| search),` `separated_regions (info \| search),` `inside (info \| search),` `recursion (info \| search)`
	WORLD	`varied_thickness_curves_drawing [smaller \| same \| bigger]`
	AUTHOR	`Aaron David Fairbanks`

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