The function $y = g(x) = \mathrm{log}\big(W(e^x)\big)$, where $W()$ denotes the Lambert W function, is the solution to the equation $y + e^y = x$. It appears in various problem situations, for instance the calculation of current-voltage curves for solar cells. A direct calculation of $g(x)$ may be inaccurate because of arithmetic underflow or overflow. We present a simple algorithm for calculating $g(x)$ that is robust, in that it will work for almost all $x$ values which are representable in the arithmetic of one's chosen computer language. The algorithm does not assume that the chosen computer language implements the Lambert W function.
Accurate and efficient explicit approximations of the Colebrook flow friction equation based on the Wright-Omega function
European Commission, Joint Research Centre (JRC), Directorate C: Energy, Transport and Climate, Unit C3: Energy Security, Distribution and Markets（欧盟委员会联合研究中心）；Alfatec；IT4Innovations National Supercomputing Center, VŠB—Technical University of Ostrava（俄斯特拉发理工大学IT4创新国家超级计算中心）
Probabilistic approximation of fully nonlinear second-order PIDEs with convergence rates for the universal robust limit theorem
College of Mathematics and Systems Science, Shandong University of Science and Technology（山东科技大学数学与系统科学学院）；Zhongtai Securities Institute for Financial Studies, Shandong University（山东大学齐鲁证券金融研究院）；Department of Statistics, The University of Warwick（华威大学统计系）
