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BP538 Shown is a box of this Bongard Problem (BP538) vs. not so.
(edit; present; nest [left/right]; search; history)
CROSSREFS

Adjacent-numbered pages:
BP533 BP534 BP535 BP536 BP537  *  BP539 BP540 BP541 BP542 BP543

KEYWORD

less, notso, left-finite, finished, invalid, experimental, funny

CONCEPT recursion (info | search),
self-reference (info | search)

AUTHOR

Aaron David Fairbanks

BP537 Meta Bongard Problems vs. other Bongard Problems.
BP200
BP501
BP503
BP504
BP506
BP507
BP508
BP509
BP510
BP511
BP512
BP513
BP514
BP515
BP516
BP517
BP518
BP519
BP520
BP521
BP522
BP526
BP534
BP535
BP537
BP539
BP541
BP542
BP544
BP546
BP547
BP549
BP550
BP552
BP553

. . .

BP1
BP2
BP3
BP4
BP5
BP6
BP7
BP8
BP9
BP10
?
BP1080
(edit; present; nest [left/right]; search; history)
COMMENTS

Bongard Problems sorted left have the keyword "meta" on the OEBP.


Meta Bongard Problems are Bongard Problems that sort Bongard Problems. Sometimes abbreviated MBPs.


The first meta Bongard Problem was BP200.


Some meta BP pages sort images of Bongard Problems (keyword miniproblems), while other meta BP pages sort other BP pages (keyword links).

CROSSREFS

BPs that sort meta-BPs are labelled metameta.

Adjacent-numbered pages:
BP532 BP533 BP534 BP535 BP536  *  BP538 BP539 BP540 BP541 BP542

KEYWORD

meta (see left/right), links, keyword, world, left-self, sideless, metameta, left-full, feedback

CONCEPT recursion (info | search)

WORLD

bp [smaller | same | bigger]
zoom in left (linksbp)

AUTHOR

Aaron David Fairbanks

BP536 All gears can make complete turns vs. not so.
(edit; present; nest [left/right]; search; history)
CROSSREFS

See BP336 for one gear turns all.

Adjacent-numbered pages:
BP531 BP532 BP533 BP534 BP535  *  BP537 BP538 BP539 BP540 BP541

KEYWORD

stretch, physics, traditional

CONCEPT all (info | search),
gear (info | search)

WORLD

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

AUTHOR

Aaron David Fairbanks

BP535 Visual Bongard Problems such that flipping over the vertical axis (left/right) can switch an example's side vs. visual Bongard Problems whose examples' sorting doesn't change under such a transformation.
BP8
BP43
BP67
BP109
BP207
BP234
BP278
BP279
BP313
BP337
BP357
BP363
BP372
BP793
BP795
BP796
BP805
BP830
BP881
BP931
BP955
BP961
BP971
BP1008
BP1014
BP1024
BP1025
BP1027
BP1028
BP1029
BP1030
BP1031
BP1032
BP1033
BP1034

. . .

BP199
BP839
BP896
BP972
BP986
BP1122
(edit; present; nest [left/right]; search; history)
COMMENTS

Left examples have the keyword "leftright" on the OEBP.

CROSSREFS

See updown.

All "leftright" Bongard Problems are handed.

Adjacent-numbered pages:
BP530 BP531 BP532 BP533 BP534  *  BP536 BP537 BP538 BP539 BP540

KEYWORD

meta (see left/right), links, keyword, sideless, invariance

WORLD

handed_visualbp [smaller | same | bigger]

AUTHOR

Aaron David Fairbanks

BP534 Bongard Problems such that potential left examples can intuitively be put in bijection with potential right examples vs. other Bongard Problems.
BP7
BP8
BP19
BP36
BP43
BP45
BP54
BP55
BP63
BP64
BP67
BP95
BP106
BP109
BP157
BP158
BP180
BP196
BP197
BP211
BP234
BP278
BP279
BP286
BP313
BP337
BP357
BP363
BP372
BP513
BP514
BP515
BP516
BP517
BP793

. . .

(edit; present; nest [left/right]; search; history)
COMMENTS

This is the keyword "dual" on the OEBP.

Given an example there is some way to "flip sides" by altering it. The left-to-right and right-to-left transformations should be inverses.


It is not required that there only be one such transformation. For example, for many handed Bongard Problem, flipping an example over any axis will reliably switch its sorting.


It is not required that every left example must have its corresponding right example uploaded on the OEBP nor vice versa. See the keyword contributepairs for the BPs the OEBP advises users upload left and right examples for in pairs.

CROSSREFS

Adjacent-numbered pages:
BP529 BP530 BP531 BP532 BP533  *  BP535 BP536 BP537 BP538 BP539

KEYWORD

meta (see left/right), links, keyword, sideless

WORLD

bp [smaller | same | bigger]

AUTHOR

Aaron David Fairbanks

BP533 Contains smaller copy of itself vs. doesn't.
(edit; present; nest [left/right]; search; history)
CROSSREFS

Adjacent-numbered pages:
BP528 BP529 BP530 BP531 BP532  *  BP534 BP535 BP536 BP537 BP538

EXAMPLE

A smaller copy of EX6409 (the black area) can be located within itself, but some of the white space inside it is not retained in this smaller copy.

KEYWORD

perfect, infinitedetail, contributepairs

CONCEPT fractal (info | search),
recursion (info | search),
self-reference (info | search)

WORLD

connected_built_from_self_tile_fractals [smaller | same | bigger]

AUTHOR

Aaron David Fairbanks

BP532 Self-tiling fractal using one size of tile vs. does not tile itself with a single size of itself.
(edit; present; nest [left/right]; search; history)
CROSSREFS

This is BP344 ("rep-tiles") but for fractals.

See BP1119 for the version with multiple different sizes of tile allowed.

Adjacent-numbered pages:
BP527 BP528 BP529 BP530 BP531  *  BP533 BP534 BP535 BP536 BP537

KEYWORD

hardsort, proofsrequired, perfect, infinitedetail, contributepairs

CONCEPT fractal (info | search),
recursion (info | search),
self-reference (info | search),
tiling (info | search)

WORLD

[smaller | same | bigger]
zoom in left (fractal_self_tile)

AUTHOR

Aaron David Fairbanks

BP531 Fractal is tiled by three smaller copies of itself vs. fractal is tiled by five smaller copies of itself.
(edit; present; nest [left/right]; search; history)
COMMENTS

More specifically, all left examples shown in this Problem have Hausdorff dimension log2(3) while all right examples have Hausdorff dimension log3(5).


Left examples can tile themselves by any power of 3 smaller same-sized copies of themselves while right examples can tile themselves by any power of 5 smaller same-sized copies of themselves.


Homage to Bongard's original three versus five Problems.

CROSSREFS

Adjacent-numbered pages:
BP526 BP527 BP528 BP529 BP530  *  BP532 BP533 BP534 BP535 BP536

KEYWORD

perfect, infinitedetail

CONCEPT fractal (info | search),
recursion (info | search),
self-reference (info | search),
tiling (info | search),
three (info | search),
five (info | search)

WORLD

fractal_self_tile [smaller | same | bigger]

AUTHOR

Aaron David Fairbanks

BP530 Fractal tiles itself with uniformly scaled-down copies of itself vs. fractal tiles itself with stretched copies of itself.
(edit; present; nest [left/right]; search; history)
COMMENTS

"Self-similar" vs. "self-affine."

CROSSREFS

Adjacent-numbered pages:
BP525 BP526 BP527 BP528 BP529  *  BP531 BP532 BP533 BP534 BP535

KEYWORD

perfect, infinitedetail

CONCEPT fractal (info | search),
self-reference (info | search),
tiling (info | search)

WORLD

fractal_self_tile_affine_allowed [smaller | same | bigger]
zoom in left (fractal_self_tile)

AUTHOR

Aaron David Fairbanks

BP529 Fractal tiles itself with smaller non-rotated (nor reflected) copies of itself vs. fractal requires turning to tile itself.
(edit; present; nest [left/right]; search; history)
COMMENTS

No included examples involve reflection.

CROSSREFS

Adjacent-numbered pages:
BP524 BP525 BP526 BP527 BP528  *  BP530 BP531 BP532 BP533 BP534

KEYWORD

perfect, infinitedetail

CONCEPT fractal (info | search),
rotation_required (info | search),
self-reference (info | search),
tiling (info | search)

WORLD

fractal_self_tile [smaller | same | bigger]

AUTHOR

Aaron David Fairbanks

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