/src/main/java/net/finmath/fouriermethod/models/BatesModel.java
.add( c.multiply( lambda[i+1]) <= ).multiply( 2*sigma[i]*sigma[i])).sqrt( )
.add ( c.multiply ( lambda[i+1] ) ) .multiply ( 2*sigma[i]*sigma[i] ) ) .sqrt ( )
.subtract(beta[i]) .pow(2) .subtract( iargument.multiply(iargument) .add(iargument.multiply(-1)) .multiply(0.5) <extra_id_0> ; a[i] = iargument .multiply(rho[i] * sigma[i]) .subtract(beta[i]) .subtract(gamma[i])