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Graph Theory and Combinatorics Seminar: Separating the online and offline DP-chromatic numbers

Event Type
Feb 22, 2022   1:00 pm  
Peter Bradshaw (Simon Fraser University)
Sean English

The DP-coloring problem, also known as the correspondence coloring problem, is a graph coloring problem invented by Dvoƙák and Postle that generalizes list coloring. We consider the online and offline versions of the DP-coloring problem, and we show the existence of graphs whose online and offline DP-chromatic numbers have arbitrarily large differences. We also show some new results for the online DP-chromatic number of bipartite graphs. Joint work with Ladislav Stacho and Bojan Mohar.

For Zoom information, please contact Sean at SEnglish (at) illinois (dot) edu.

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