class X11Specification implements IProcSpecification, Cloneable {

    public void setSigma(double lsigma, double usigma) {
        if (usigma <= lsigma || lsigma <= 0.5) {
            throw new X11Exception("Invalid sigma options");
        }
        lsigma_ = lsigma;
        usigma_ = usigma;
    }

}