Nonlocal-Interaction Equation on Graphs: Gradient Flow Structure and Continuum Limit
Nonlocal-Interaction Equation on Graphs: Gradient Flow Structure and Continuum Limit
复制标题
图上的非局部相互作用方程:梯度流结构和连续极限
DOI:
10.1007/s00205-021-01631-w
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发表时间:
2021
影响因子:
2.5
通讯作者:
Slepčev, Dejan
中科院分区:
文献类型:
--
作者:
Esposito, Antonio;Patacchini, Francesco S.;Schlichting, André;Slepčev, Dejan
We consider dynamics driven by interaction energies on graphs. We introduce graph analogues of the continuum nonlocal-interaction equation and interpret them as gradient flows with respect to a graph Wasserstein distance. The particular Wasserstein distance we consider arises from the graph analogue of the Benamou–Brenier formulation where the graph continuity equation uses an upwind interpolation to define the density along the edges. While this approach has both theoretical and computational advantages, the resulting distance is only a quasi-metric. We investigate this quasi-metric both on graphs and on more general structures where the set of “vertices” is an arbitrary positive measure. We call the resulting gradient flow of the nonlocal-interaction energy the nonlocal nonlocal-interaction equation (NLIE). We develop the existence theory for the solutions of the NLIE as curves of maximal slope with respect to the upwind Wasserstein quasi-metric. Furthermore, we show that the solutions of the NLIE on graphs converge as the empirical measures of the set of vertices converge weakly, which establishes a valuable discrete-to-continuum convergence result.
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发表时间:
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影响因子:
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期刊:
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