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most citedA Li-type criterion for zero-free half-planes of Riemann's zeta function

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math.CO2001

A Heawood-type result for the algebraic connectivity of graphs on surfaces

Pedro Freitas

We prove that the algebraic connectivity a(G) of a graph embedded on a nonplanar surface satisfies a Heawood-type result. More precisely, it is shown that the algebraic connectivit…