Self-similar sets that satisfy a certain separation condition (the open set condition) are quite well understood. However, self-similar sets with "overlap", and self-affine sets (with or without overlap) still retain many mysteries. We list a few of these unsolved problems, and give references for the relevant background.
Balázs BárányKároly SimonBoris Solomyak
Christopher J. BishopYuval Peres