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math.CO2026
On the chromatic number of pseudohemisphere hypergraphs
Balázs István Szabó
A pseudohemisphere hypergraph is a hypergraph with an ordered set of vertices for which there exists an -free hypergraph on and a subset $X…
math.CO2025
Coloring one-headed directed hypergraphs
Balázs István Szabó
A directed hypergraph is a hypergraph in which the vertex set of each hyperedge is partitioned into two disjoint parts, a head and a tail. Keszegh and Pálvölgyi posed the following…