Dowker-type theorems for disk-polygons in normed planes

Basit, Bushra; Lángi, Zsolt

doi:10.1016/j.disc.2024.114019

Discrete Mathematics

2024

DOI: 10.1016/j.disc.2024.114019

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Dowker-type theorems for disk-polygons in normed planes

Bushra Basit,

Zsolt Lángi

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On a Dowker-Type Problem for Convex Disks with Almost Constant Curvature

Basit,

Lángi

2024

SScMath

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A classical result of Dowker (Bull. Amer. Math. Soc. 50: 120-122, 1944) states that for any plane convex body 𝐾, the areas of the maximum (resp. minimum) area convex 𝑛-gons inscribed (resp. circumscribed) in 𝐾 is a concave (resp. convex) sequence. It is known that this theorem remains true if we replace area by perimeter, or convex 𝑛-gons by disk-𝑛-gons, obtained as the intersection of 𝑛 closed Euclidean unit disks. It has been proved recently that if 𝐶 is the unit disk of a normed plane, then the same properties hold for the area of 𝐶-𝑛-gons circumscribed about a 𝐶-convex disk 𝐾 and for the perimeters of 𝐶-𝑛-gons inscribed or circumscribed about a 𝐶-convex disk 𝐾, but for a typical origin-symmetric convex disk 𝐶 with respect to Hausdorff distance, there is a 𝐶-convex disk 𝐾 such that the sequence of the areas of the maximum area 𝐶-𝑛-gons inscribed in 𝐾 is not concave. The aim of this paper is to investigate this question if we replace the topology induced by Hausdorff distance with a topology induced by the surface area measure of the boundary of 𝐶.

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On a Dowker-Type Problem for Convex Disks with Almost Constant Curvature

Basit,

Lángi

2024

SScMath

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Dowker-type theorems for disk-polygons in normed planes

Cited by 1 publication

References 25 publications

On a Dowker-Type Problem for Convex Disks with Almost Constant Curvature

On a Dowker-Type Problem for Convex Disks with Almost Constant Curvature

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