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On Bonnesen-style Aleksandrov-Fenchel inequalities in Rn

Chunna Zeng
대한수학회 (The Korean Mathematical Society)|2017.05|대한수학회보 (Bulletin of the KMS)|제54권 제3호|pp. 799-816

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참고문헌

키워드

mixed volumeisoperimetric inequalityBonnesen-style inequalityAleksandrov-Fenchel inequality
주제분류수학

초록

In this paper, we investigate the Bonnesen-style Aleksandrov-Fenchel inequalities in $\mathbb R^{n},$ which are the generalization of known Bonne\-sen-style inequalities. We first define the $i$-th symmetric mixed homothetic deficit $\Delta_{i}(K, L)$ and its special case, the $i$-th Aleksandrov-Fenchel isoperimetric deficit $\Delta_{i}(K).$ Secondly, we obtain some lower bounds of $(n-1)$-th Aleksandrov Fenchel isoperimetric deficit $\Delta_{n-1}(K).$ Theorem \ref{thm3} strengthens Groemer's result. As direct consequences, the stronger isoperimetric inequalities are established when $n=2$ and $n=3.$ Finally, the reverse Bonnesen-style Aleksandrov-Fenchel inequalities are obtained. As a consequence, the new reverse Bonnesen-style inequality is obtained.

Abstract

In this paper, we investigate the Bonnesen-style Aleksandrov-Fenchel inequalities in $\mathbb R^{n},$ which are the generalization of known Bonne\-sen-style inequalities. We first define the $i$-th symmetric mixed homothetic deficit $\Delta_{i}(K, L)$ and its special case, the $i$-th Aleksandrov-Fenchel isoperimetric deficit $\Delta_{i}(K).$ Secondly, we obtain some lower bounds of $(n-1)$-th Aleksandrov Fenchel isoperimetric deficit $\Delta_{n-1}(K).$ Theorem \ref{thm3} strengthens Groemer's result. As direct consequences, the stronger isoperimetric inequalities are established when $n=2$ and $n=3.$ Finally, the reverse Bonnesen-style Aleksandrov-Fenchel inequalities are obtained. As a consequence, the new reverse Bonnesen-style inequality is obtained.

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