login
Hints
(Greetings from The On-Line Encyclopedia of Bongard Problems!)
Search: all:new
Displaying 771-780 of 1161 results found. ( prev | next )     page 1 ... 74 75 76 77 78 79 80 81 82 ... 117
     Sort: recent      Format: long      Filter: (all | no meta | meta)      Mode: (words | no words)
BP391 There exists an edge such that removing it yields two disconnected graphs (i.e., the minimum number of edges whose removal results in two disconnected graphs is 1) vs. the minimum number of edges whose removal results in two disconnected graphs is 2.
(edit; present; nest [left/right]; search; history)
CROSSREFS

Adjacent-numbered pages:
BP386 BP387 BP388 BP389 BP390  *  BP392 BP393 BP394 BP395 BP396

KEYWORD

nice, precise, traditional, preciseworld

CONCEPT graph (info | search),
distinguishing_crossing_curves (info | search),
existence (info | search),
imagined_shape (info | search),
imagined_entity (info | search)

WORLD

connected_graph [smaller | same | bigger]

AUTHOR

Jago Collins

BP390 Each graph vertex is uniquely defined by its connections (the graph does not admit nontrivial automorphisms) vs. the graph admits nontrivial automorphisms.
(edit; present; nest [left/right]; search; history)
CROSSREFS

Adjacent-numbered pages:
BP385 BP386 BP387 BP388 BP389  *  BP391 BP392 BP393 BP394 BP395

KEYWORD

precise, allsorted, notso, traditional, preciseworld

CONCEPT graph (info | search),
self-reference (info | search),
topological_transformation (info | search),
imagined_shape (info | search),
imagined_entity (info | search)

WORLD

connected_graph [smaller | same | bigger]

AUTHOR

Jago Collins

BP389 Loops are entangled (in 3-D) vs. loops can be separated (in 3-D).
(edit; present; nest [left/right]; search; history)
CROSSREFS

Adjacent-numbered pages:
BP384 BP385 BP386 BP387 BP388  *  BP390 BP391 BP392 BP393 BP394

KEYWORD

nice, precise, allsorted, contributepairs, traditional

CONCEPT knot (info | search),
topological_transformation (info | search),
imagined_motion (info | search),
motion (info | search)

WORLD

link_two_knots [smaller | same | bigger]

AUTHOR

Jago Collins

BP388 White dot can see (in straight lines) all black points vs. white dot cannot see (in straight lines) all black points.
(edit; present; nest [left/right]; search; history)
CROSSREFS

See BP368 for whether ALL points can see all points.

Adjacent-numbered pages:
BP383 BP384 BP385 BP386 BP387  *  BP389 BP390 BP391 BP392 BP393

KEYWORD

nice, traditional

CONCEPT all (info | search),
imagined_line_or_curve (info | search),
imagined_entity (info | search)

WORLD

fill_shape_white_dot [smaller | same | bigger]

AUTHOR

Jago Collins

BP387 Dots can be shared equally between figures vs. dots cannot be shared equally between figures.
(edit; present; nest [left/right]; search; history)
CROSSREFS

Adjacent-numbered pages:
BP382 BP383 BP384 BP385 BP386  *  BP388 BP389 BP390 BP391 BP392

KEYWORD

nice, traditional

CONCEPT division (info | search)

AUTHOR

Jago Collins

BP386 Lower shape can be used as a tile to build the upper one vs. not so.
(edit; present; nest [left/right]; search; history)
CROSSREFS

Adjacent-numbered pages:
BP381 BP382 BP383 BP384 BP385  *  BP387 BP388 BP389 BP390 BP391

KEYWORD

nice, precise, allsorted, left-narrow, perfect, pixelperfect, orderedpair, traditional, preciseworld, left-listable, right-listable

CONCEPT tiling (info | search)

AUTHOR

Jago Collins

BP385 Nets of cubes vs. not nets of cubes.
(edit; present; nest [left/right]; search; history)
CROSSREFS

Adjacent-numbered pages:
BP380 BP381 BP382 BP383 BP384  *  BP386 BP387 BP388 BP389 BP390

KEYWORD

nice, notso, left-finite, traditional

CONCEPT 3d_net (info | search)

WORLD

square_outlines_sharing_edges [smaller | same | bigger]
zoom in left (cube_net)

AUTHOR

Jago Collins

BP384 Square number of dots vs. non-square number of dots.
(edit; present; nest [left/right]; search; history)
COMMENTS

All examples in this Problem are a collection of dots.


An equivalent solution is "Dots can be arranged into a square lattice whose convex hull is a square vs. not so". - Leo Crabbe, Aug 01 2020

CROSSREFS

Adjacent-numbered pages:
BP379 BP380 BP381 BP382 BP383  *  BP385 BP386 BP387 BP388 BP389

EXAMPLE

A single dot fits because 1 = 1*1.

A pair of dots does not fit because there is no integer x such that 2 = x*x.

KEYWORD

nice, precise, allsorted, number, math, left-narrow, left-null, help, traditional, preciseworld, collection

CONCEPT square_number (info | search)

WORLD

dots [smaller | same | bigger]

AUTHOR

Jago Collins

BP383 When the shape is removed from the dots, the dots give enough information to place the shape back where it was vs. not so.
(edit; present; nest [left/right]; search; history)
CROSSREFS

Adjacent-numbered pages:
BP378 BP379 BP380 BP381 BP382  *  BP384 BP385 BP386 BP387 BP388

KEYWORD

hard, nice, traditional

CONCEPT imagined_line_or_curve (info | search),
imagined_entity (info | search),
convey_enough_information (info | search)

AUTHOR

Aaron David Fairbanks

BP382 No knot (unknot) vs. knot.
(edit; present; nest [left/right]; search; history)
COMMENTS

To hint at the solution, left examples can be arranged in a sequence to show the unknot tying itself.

CROSSREFS

Adjacent-numbered pages:
BP377 BP378 BP379 BP380 BP381  *  BP383 BP384 BP385 BP386 BP387

KEYWORD

nice, math, anticomputer, help, traditional

CONCEPT knot (info | search),
topological_transformation (info | search)

WORLD

knot [smaller | same | bigger]

AUTHOR

Aaron David Fairbanks

( prev | next )     page 1 ... 74 75 76 77 78 79 80 81 82 ... 117

Welcome | Solve | Browse | Lookup | Recent | Links | Register | Contact
Contribute | Keywords | Concepts | Worlds | Ambiguities | Transformations | Invalid Problems | Style Guide | Goals | Glossary