Fractal tiles itself with uniformly scaled-down copies of itself vs. fractal tiles itself with stretched copies of itself.

Fractal tiles itself with uniformly scaled-down versions of itself vs. fractal tiles itself with stretched versions of itself.

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

Aaron David Fairbanks

Assumed contained in bounding box.

Curves must have length; they are not just points.

Bongard Problems with "world" one simple non-closed non-self-intersecting thin black curve (corners and cusps allowed) vs. other Bongard Problems.

Bongard Problems with "world" one simple non-closed non-self-intersecting thin black curve (corners allowed) vs. other Bongard Problems.

Bongard Problems with "world" one simple non-closed non-self-intersecting thin black curve vs. other Bongard Problems.

Bongard Problems about multiple simple 2D connected shapes.

Aaron David Fairbanks

Assumed contained in bounding box.

Bongard Problems with "world" one simple non-closed non-self-intersecting curve vs. other Bongard Problems.

Bongard Problems with "world" one simple non-closed non-self-intersecting curve.

Bongard Problems with "world" one simple non-closed curve.

Bongard Problems with "world" finitely many simple 2D closed or non-closed curves with self-intersections and intersections between different curves allowed.

Bongard Problems with "world" (perhaps multiple) simple 2D closed or non-closed curves with self-intersections and intersections between different curves allowed.

Bongard Problems with "world" (perhaps multiple) simple 2D closed or non-closed curves with self-intersections allowed.

Bongard Problems with "world" (perhaps multiple) simple 2D connected shapes.

Bongard Problem with "world" (perhaps multiple) simple 2D connected shapes.