Distance function and extension in normal direction for implicitly defined interfaces

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Abstract

In this paper we present a novel application of extrapolation pro- cedure for three popular numerical algorithms to compute the distance func- tion for an interface that is given only implicitly. The methods include the fast marching method [8], the fast sweeping method [10] and the linearization method [3]. The extrapolation procedure removes the necessity of a special ini- tialization procedure for the grid nodes next to the interface that is used so far with the methods, thus it represents a natural extension of these methods. The extrapolation procedure can be used also for an extension of a function that is defined only locally on the interface in the direction given by the gradient of distance function [2].

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Frolkovič, P., Mikula, K., & Urbán, J. (2015). Distance function and extension in normal direction for implicitly defined interfaces. Discrete and Continuous Dynamical Systems - Series S, 8(5), 871–880. https://doi.org/10.3934/dcdss.2015.8.871

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