We show that for every n there are two simple curves on the torus intersecting at least n times without the two curves folding or spiralling with respect to each other.
Marcus Schaefer, Eric Sedgwick, Daniel Stefankovic
We find exact values for the game chromatic number of the Cartesian product graphs Sm Pn, Sm Cn, P2 Wn, and P2 Km,n. This extends previous results of Bartnicki et al. on the game...