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arXiv 2204.00860math.MGmath.APmath.FA
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关于$C$ -共凸集的$L_p$ Brunn-Minkowski理论和$L_p$ Minkowski问题

On the $L_p$ Brunn-Minkowski theory and the $L_p$ Minkowski problem for $C$-coconvex sets

Jin Yang, Deping Ye, Baocheng Zhu

摘要:

设$C$是$\mathbb{R}^n$中顶点在原点$o$上且内部非空的尖闭凸锥.如果$A$的体积有限且$A^{\bullet}=C\setminus A$是闭凸集,则集合$A\subset C$是$C$ -共凸的.对于$0<p<1$,引入了$C$ -共凸集的$p$ -共和,建立了$C$ -共凸集的相应的$L_p$ Brunn-Minkowski不等式.我们还定义了$L_p$表面积的措施,为$0\neq p\in \mathbb{R}$,某些$C$ -共凸集,这是至关重要的,在推导出一个变分公式的体积的武尔夫形状与家庭的功能从$p$ -共和。这激发了$L_p$ Minkowski问题,旨在描述$C$ -共凸集的$L_p$表面积测度。对所有的$0\neq p\in \mathbb{R}$建立了$L_p$ Minkowski问题解的存在性.证明了$0<p<1$的$L_p$ Minkowski不等式,并利用该不等式得到了$0<p<1$的$L_p$ Minkowski问题解的唯一性.对于$p=0$,我们引入了两个$C$ -共凸集$A_{1}$和$A_{2}$关于$τ\in(0, 1)$的对数余和$(1-τ)\diamond A_1\oplus_0τ\diamond A_2$,并证明了$C$ -共凸集的对数Brunn-Minkowski不等式. log-Minkowski不等式也被获得,并应用于证明的唯一性的log-Minkowski问题的解决方案,$C$ -共凸集的锥体积措施的特点。我们的结果解决了Schneider在[Schneider,Adv. Math.,332(2018),pp. 199-219]。

英文摘要:

Let $C$ be a pointed closed convex cone in $\mathbb{R}^n$ with vertex at the origin $o$ and having nonempty interior. The set $A\subset C$ is $C$-coconvex if the volume of $A$ is finite and $A^{\bullet}=C\setminus A$ is a closed convex set. For $0<p<1$, the $p$-co-sum of $C$-coconvex sets is introduced, and the corresponding $L_p$ Brunn-Minkowski inequality for $C$-coconvex sets is established. We also define the $L_p$ surface area measures, for $0\neq p\in \mathbb{R}$, of certain $C$-coconvex sets, which are critical in deriving a variational formula of the volume of the Wulff shape associated with a family of functions obtained from the $p$-co-sum. This motivates the $L_p$ Minkowski problem aiming to characterize the $L_p$ surface area measures of $C$-coconvex sets. The existence of solutions to the $L_p$ Minkowski problem for all $0\neq p\in \mathbb{R}$ is established. The $L_p$ Minkowski inequality for $0<p<1$ is proved and is used to obtain the uniqueness of the solutions to the $L_p$ Minkowski problem for $0<p<1$. For $p=0$, we introduce $(1-τ)\diamond A_1\oplus_0τ\diamond A_2$, the log-co-sum of two $C$-coconvex sets $A_{1}$ and $A_{2}$ with respect to $τ\in(0, 1)$, and prove the log-Brunn-Minkowski inequality of $C$-coconvex sets. The log-Minkowski inequality is also obtained and is applied to prove the uniqueness of the solutions to the log-Minkowski problem that characterizes the cone-volume measures of $C$-coconvex sets. Our result solves an open problem raised by Schneider in [Schneider, Adv. Math., 332 (2018), pp. 199-219].

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