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math.MG2021
Cubes and Boxes have Rupert's passages in every direction
András Bezdek, Zhenyue Guan, Mihály Hujter +1
It is a year old counterintuitive observation of Prince Rupert of Rhine that in cube a straight tunnel can be cut, through which a second congruent cube can be passed. Hundre…
math.CO2021
Precoloring Extension. IV. General Bounds and List Colorings
Mihály Hujter, Zsolt Tuza
A guaranteed upper bound is proved for the time complexity of the list-coloring problem on graphs.