Codice  QDD228 
Titolo  On the honeycomb conjecture for a class of minimal convex partitions 
Data  20170706 
Autore/i  Bucur, D.; FragalĂ , I.; Velichkov, B.; Verzini, G. 
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Abstract  We prove that the planar hexagonal honeycomb is asymptotically optimal for a large class of optimal partition problems, in which the cells are assumed to be convex, and the criterion is to minimize either the sum or the maximum among the energies of the cells, the cost being a shape functional F which satisfies a few assumptions. They are: monotonicity under inclusions; homogeneity under dilations; a FaberKrahn inequality for convex hexagons; a convexitytype inequality for the map which associates with every integer n the minimizers of F among convex ngons with given area. In particular, our result allows to obtain the honeycomb conjecture for the Cheeger constant and for the logarithmic capacity (still assuming the cells to be convex). Moreover we show that, in order to get the conjecture also for the first Dirichlet eigenvalue of the Laplacian, it is sufficient to establish some facts about its behaviour among convex pentagons, hexagons, and heptagons with prescribed area.

