In this case, gðxÞ ≤θ can be replaced by x ≤ε, where ε satisfies
gðεÞ ¼ θ. Since gðxÞ is monotone increasing over (0,1] then ε is
unique within this interval and can easily be found using
efficient numerical search techniques, such as the bisection
method (see Burden et al., 1985).