Bispindles in strongly connected digraphs with large chromatic number

N. Cohenn, F. Havet, W. Lochet +1

A $(k_1+k_2)$-bispindle is the union of $k_1$ $(x,y)$-dipaths and $k_2$ $(y,x)$-dipaths, all these dipaths being pairwise internally disjoint. Recently, Cohen et al. showed that fo…