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arXiv 2109.05938math-phmath.MP
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齐次动量空间紧致子集上因果变分原理极小元的存在性

Existence of Minimizers for Causal Variational Principles on Compact Subsets of Momentum Space in the Homogeneous Setting

Christoph Langer

摘要:

在齐次环境下,证明了在几个边条件(约束)下,动量空间的紧子集上的负定测度类中极小元的存在性。方法是使用Prohorov定理。给出了一个极小化的负定测度序列,证明了在适当的边条件下,其酉等价子序列是有界的。通过将注意力限制在紧子集上,从Prohorov定理我们推出了在负定测度类中极小元的存在性。

英文摘要:

We prove the existence of minimizers in the class of negative definite measures on compact subsets of momentum space in the homogeneous setting under several side conditions (constraints). The method is to employ Prohorov's theorem. Given a minimizing sequence of negative definite measures, we show that, under suitable side conditions, a unitarily equivalent subsequence thereof is bounded. By restricting attention to compact subsets, from Prohorov's theorem we deduce the existence of minimizers in the class of negative definite measures.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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