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Equality cases of the Alexandrov–Fenchel inequality are not in the polynomial hierarchy

open access: yesForum of Mathematics, Pi
Describing the equality conditions of the Alexandrov–Fenchel inequality [Ale37] has been a major open problem for decades. We prove that in the case of convex polytopes, this description is not in the polynomial hierarchy unless the polynomial hierarchy ...
Swee Hong Chan, Igor Pak
doaj   +1 more source

New inequalities for p(n) and logp(n). [PDF]

open access: yesRamanujan J, 2023
Banerjee K, Paule P, Radu CS, Zeng W.
europepmc   +1 more source

Gromov hyperbolicity of planar graphs

open access: yesOpen Mathematics, 2013
Cantón Alicia   +3 more
doaj   +1 more source

Gromov hyperbolic cubic graphs

open access: yesOpen Mathematics, 2012
Pestana Domingo   +3 more
doaj   +1 more source

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