Hi I have a function "fx", whose maximum is sought in attached file. There is a parameter "delta", which significantly affects the maxima of function "fx". The values of "delta" ranges from -1.5 to 1.5.

It is observed that, when the delta is defined to have values between 0 to 0.3, the program returns local maxima, rather that the global maxima of the function. For any other value of delta between -1.5 to 1.5 (except 0 to 0.3), it always return the global maxima.

Can we designate the command, so that it always returns the global maxima of fx for phi taking values between -Pi to Pi.

Kindly see the attached file for more explanations Thanks.