Dickson Y. B. Annor

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20222026

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math.CO2024

Three Theorems on Negami's Planar Cover Conjecture

Dickson Annor, Yuri Nikolayevsky, Michael Payne

A long-standing Conjecture of S. Negami states that a connected graph has a finite planar cover if and only if it embeds in the projective plane. It is known that the Conjecture is…

math.CO2024

On $r$ -Equichromatic Lines with few points in $C^{2}$

Dickson Y. B. Annor

Let $P$ be a set of $n$ green and $n - k$ red points in $C^{2}$ . A line determined by $i$ green and $j$ red points such that $i + j \geq 2$ and $∣ i - j ∣ \leq r$ is called \emp…

Three Theorems on Negami's Planar Cover Conjecture

On r-Equichromatic Lines with few points in C2

On $r$ -Equichromatic Lines with few points in $C^{2}$