Hierarchical and modularly-minimal vertex colorings

Dulce I. Valdivia, Maribel Hernández Rosales, Manuela Geiß, Peter F. Stadler, Marc Hellmuth
<span title="2022-02-23">2022</span> <i title="University of Primorska Press"> <a target="_blank" rel="noopener" href="https://fatcat.wiki/container/t6ww6geapvdgvhfxgi7hy6vv6y" style="color: black;">The Art of Discrete and Applied Mathematics</a> </i> &nbsp;
Dedicated to Wilfried Imrich on occasion of his 80th birthday. In a roundabout way, we have to blame Wilfried. If he had not infected a few theoretical chemists with his enthusiasm about graphs and their products during a small seminar on Turracher Höhe in March 1988, this paper would never have been written.
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