The details are given in Ref. With an initial guess for T ( E ) and the range restricted to lie between T L and T U , the simulation proceeds as in WLMC, with significant numerical differences. An interpolation of T ~ ~ ( E ) gives a continuum expression of the estimated S ( E ) upon integration of its inverse, allowing the use of larger energy bins than in WL. Different values of S ( E ) are available within the same energy bin when evaluating the acceptance probability. When histogram fluctuations are less than 20% of the mean, f is reduced according to f → → f .