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Lower Bounds on Nodal Sets of Eigenfunctions via the Heat Flow

Lower Bounds on Nodal Sets of Eigenfunctions via the Heat Flow

We study the size of nodal sets of Laplacian eigenfunctions on compact Riemannian manifolds without boundary and recover the currently optimal lower bound by comparing the heat flow of the eigenfunction with that of an artificially constructed diffusion process. The same method should apply to a number of other questions; …