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math.CO2025
A shorter proof of the Four Colour Theorem
Carl Feghali
We give a pen and paper and (comparatively) much simpler proof to verify of the Four Colour Theorem.
math.CO2024
A short proof of the Four Colour Theorem
Carl Feghali
We make an attempt at proving the Four Colour Theorem in six pages.
math.CO2024
A (simple) proof of the rna conjecture on powers of cycles
Carl Feghali, Felicia Lucke
We verify a recent conjecture of Sehrawat, Kumar and Ahlawat on the minimum bisection width (a notion that was rediscovered in 2020 by Acharya and Kureethara under the name of rna…