Coloring of graphs and hypergraphs
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Coefficient of the acyclic chromatic index: determine C 55 or improve its bounds; the repository records 1 (lower) and 3.142 (upper).
Maximum Chromatic Number of Biplanar Graphs: determine C 27b or improve its bounds; the repository records 9 (lower) and 12 (upper).
Chromatic number of the plane: determine C 27a or improve its bounds; the repository records 5 (lower) and 7 (upper).
The Earth–Moon Problem. Moderately interesting problem from Epoch AI’s FrontierMath: Open Problems; answers are checked by a verifier program.
These are selected sources for the parent class. Article coverage is a first reviewed selection, and may not cover this exact subcategory.
Electronic Journal of Combinatorics
Combinatorics and graph theory
Journal discovery is available; article-level extraction for this class is not yet included in this batch.
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