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10/18/2022
The smallest 5-chromatic tournament
A coloring of a digraph is a partition of its vertex set such that each ...
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07/03/2022
On the minimum number of arcs in k-dicritical oriented graphs
The dichromatic number (D) of a digraph D is the least integer k such th...
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07/01/2019
The directed 2-linkage problem with length constraints
The weak 2-linkage problem for digraphs asks for a given digraph and ve...
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10/01/2018
On the density of sets of the Euclidean plane avoiding distance 1
A subset A ⊂ R^2 is said to avoid distance 1 if: ∀ x,y ∈ A, x-y _2 ≠ 1....
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10/24/2017
