document.write("« Erd\H{o}s-Ulam ideals vs. simple density ideals. (arXiv:1711.03578v2 [math.CO] UPDATED)");document.write(" | ");document.write("Evaluating High Order Discontinuous Galerkin Discretization of the Boltzmann Collision Integral in $O(N^2)$ Operations Using the Discrete Fourier Transform. (arXiv:1801.05892v1 [math.NA]) »");