Large data limit for a phase transition model with the p -Laplacian on point clouds
Riccardo Cristoferi, M. F. Thorpe · European Journal of Applied Mathematics · 2018
The consistency of a non-local anisotropic Ginzburg–Landau type functional for data classification and clustering is studied. The Ginzburg–Landau objective functional combines a double well potential, that favours indicator valued functions, and the p -Laplacian, that enforces regularity. Under appropriate scaling between the two terms, minimisers exhibit a phase transition on the order of ɛ = ɛ n , where n is the number of data points. We study the large data asymptotics, i.e. as n → ∝, in the regime where ɛ n → 0. The mathematical tool used to address this question is Γ-convergence. It is proved that the discrete model converges to a weighted anisotropic perimeter.