The unwinding that Cook (J. Symbol. Log. 69(3), 767–774 2004) proposed is a simple but powerful method of generating new paradoxes from known ones. This paper extends Cook's unwinding to a larger ...

In 2001, Škrekovski proposed the following conjecture (see [1]): Conjecture (Škrekovski): Let G be a simple planar graph, and let D be a digraph obtained from G by orienting all of its edges. Then V(D ...