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01/21/2022
Separating polynomial χ-boundedness from χ-boundedness
Extending the idea from the recent paper by Carbonero, Hompe, Moore, and...
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12/09/2021
A solution to Ringel's circle problem
We construct families of circles in the plane such that their tangency g...
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08/12/2021
Grounded L-graphs are polynomially χ-bounded
A grounded L-graph is the intersection graph of a collection of "L" shap...
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03/13/2021