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The circumradius of planar reduced convex bodies

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Abstract

In this paper, we discuss the circumradius of reduced convex polygons and Reuleaux polygons. We prove that from amongst all reduced convex n-gons of a fixed thickness, only the regular n-gon has the minimal circumradius. For Reuleaux polygons, we show that from amongst all n-th Reuleaux polygons, only the regular n-th Reuleaux polygon has the minimal circumradius.

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Contributions

The problem was proposed by HJ. Theorem 1 was proved by QC and HJ, and Theorem 2 was proved by BC and HJ. HJ wrote the manuscript.

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Correspondence to Hailin Jin.

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Project supported by National Nature Science Foundation of China No. 12071334 and No. 12071277.

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Chen, Q., Chen, B. & Jin, H. The circumradius of planar reduced convex bodies. J. Geom. 114, 6 (2023). https://doi.org/10.1007/s00022-023-00667-5

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  • DOI: https://doi.org/10.1007/s00022-023-00667-5

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