Restriction of toral eigenfunctions to hypersurfaces and nodal sets
  We give uniform upper and lower bounds for the L^2 norm of the restriction of eigenfunctions of the Laplacian on the three-dimensional standard flat torus to surfaces with non-vanishing curvature. We also present several related results concerning the nodal sets of eigenfunctions. 
Jean Bourgain and Zeev Rudnick
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