Van der Waerden's Theorem and Avoidability in Words

Yu-Hin Au, Aaron Robertson, Jeffrey Shallit
2011 Integers  
AbstractIndependently, Pirillo and Varricchio, Halbeisen and Hungerbühler and Freedman considered the following problem, open since 1992: Does there exist an infinite word
doi:10.1515/integ.2011.007 fatcat:xvk5v3hkzzhjfhcuixmoipovtm