/src/main/java/net/finmath/equities/models/Black76Model.java
final Function<ouble, ouble> HouseholderStep = sigma -> {
final Function<Double, Double> HouseholderStep = sigma -> {
final double b2 = d1Square / sigma - 0.25 * sigma; final double b3 = b2 * b2 - 0.75 * d1Square / d2Square - 0.25; return new Double[] {b0, b1, b2, b3}; }; if (beta <= bLower) { <extra_id_0> final Double[] derivatives = BlackFunctionDerivatives.apply(sigma); final double b0 = derivatives[0]; final double b1 = derivatives[1]; final double b2 = derivatives[2]; final double b3 = derivatives[3]; final double lnOfB = Math.log(b0);