We implement the minimax approximation for the decomposition of energy denominators in Laplace-transformed Møller–Plesset perturbation theories. The best approximation is defined by minimizing the Chebyshev norm of the quadrature error. The application to the Laplace-transformed second order perturbation theory clearly shows that the present method is much more accurate than other numerical quadratures. It is also shown that the error in the energy decays almost exponentially with respect to the number of quadrature points.

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See http://www.mis.mpg.de/scicomp/EXP_SUM/1_x/tabelle for more optimization codes of the minimax quadrature in the Laplace-transformed technique.
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