Numerical Optimal Transport from 1D to 2D Using a Non-local Monge-Ampère Equation
Numerical Optimal Transport from 1D to 2D Using a Non-local Monge-Ampère Equation
复制标题
使用非局部 Monge-Ampère 方程从 1D 到 2D 的数值最优传输
DOI:
10.1007/s44007-024-00092-3
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发表时间:
2024
期刊:
影响因子:
--
通讯作者:
Hamfeldt, Brittany Froese
中科院分区:
文献类型:
--
作者:
Cassini, Matthew A.;Hamfeldt, Brittany Froese
We consider the numerical solution of the optimal transport problem between densities that are supported on sets of unequal dimension. Recent work by McCann and Pass reformulates this problem into a non-local Monge-Ampère type equation. We provide a new level-set framework for interpreting this nonlinear PDE. We also propose a novel discretisation that combines carefully constructed monotone finite difference schemes with a variable-support discrete version of the Dirac delta function. The resulting method is consistent and monotone. These new techniques are described and implemented in the setting of 1D to 2D transport, but they can easily be generalised to higher dimensions. Several challenging computational tests validate the new numerical method.
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DOI:
10.1090/mcom/3080
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期刊:
Math. Comput.
影响因子:
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DOI:
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期刊:
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