Incomputability of Simply Connected Planar Continua
Takayuki Kihara · Computability · 2012
Le Roux and Ziegler asked whether every simply connected compact nonempty planar $\Pi^0_1$ set always contains a computable point. In this paper, we solve the problem of le Roux and Ziegler by showing that there exists a planar $\Pi^0_1$ dendroid wit