Second-order NQT functions, a C^1 piecewise quadratic approximation to log2, preserve second-order convergence of linear interpolation on logarithmic grids while running faster than true logarithms.
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Not-Quite-Transcendental Functions For Logarithmic Interpolation of Tabulated Data
Second-order NQT functions, a C^1 piecewise quadratic approximation to log2, preserve second-order convergence of linear interpolation on logarithmic grids while running faster than true logarithms.