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Showing 2020 · math.COShow all
2 papers · 2 filters
math.CO2020★ 1 cited
On a conjecture by Anthony Hill
Bojan Mohar
In the 1950's, English painter Anthony Hill described drawings of complete graphs in the plane having precisely $$H(n) = \tfrac{1}{4}\lfloor \tfrac{n}{2}\rfloor \, \lfloor \t…
math.CO2020★ 2 cited
Many flows in the group connectivity setting
Matt DeVos, Rikke Langhede, Bojan Mohar +1
Two well-known results in the world of nowhere-zero flows are Jaeger's 4-flow theorem asserting that every 4-edge-connected graph has a nowhere-zero $\mathbb{Z}_2 \times \mathbb{Z}…