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arXiv 1204.2190math.PRmath.APmath.MG
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跳过程的熵梯度流

Gradient flows of the entropy for jump processes

Matthias Erbar

摘要:

我们引入了一个新的运输距离之间的概率测度,是建立在一个Lévy跳跃内核。它通过Benamou-Brenier公式的非局部变体定义。我们研究了这种距离的几何和拓扑性质,特别证明了测地线的存在性。对于平移不变跳跃核,我们将由相关非局部算子生成的半群确定为相对熵w.r.t.新的距离,并表明熵是凸沿测地线。

英文摘要:

We introduce a new transportation distance between probability measures that is built from a Lévy jump kernel. It is defined via a non-local variant of the Benamou-Brenier formula. We study geometric and topological properties of this distance, in particular we prove existence of geodesics. For translation invariant jump kernels we identify the semigroup generated by the associated non-local operator as the gradient flow of the relative entropy w.r.t. the new distance and show that the entropy is convex along geodesics.

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