It's been proven impossible.

@moha You say "h = delta t", but what is delta x?

Are the time spacing and the spatial spacing both given by h?

You need to give some initial and boundary conditions.

Great question! What you want to do is possible, but before I answer I want to know if you need to know the order that the calls to the objective function are made. Both options are fairly easy, but it is somewhat more complicated to get the order.

@pzwp In Maple 17.01 the version with Expand executes instantaneously.

@pzwp In Maple 17.01 the version with Expand executes instantaneously.

@Markiyan Hirnyk Interesting. How do you find the intersection of the ranges?

@Markiyan Hirnyk Interesting. How do you find the intersection of the ranges?

@acer In Maple 17.01/64/Windows 8, my results agree with the Asker's. I recall recent discussion on MaplePrimes that they were going to address some bugs of simplify applied to expressions with conjugates. The reason that the evalc trick worked was that it removed the conjugate.

@pzwp The difference between expand and Expand is in the order of evaluation. With

expand((1+x)*x) mod 2

the expand is done first, then the mod. With

Expand((1+x)*x) mod 2

the mod is applied to the factors before expanding. Compare the difference in the amount of time between

expand((1+2*x)^(2^16)) mod 2

and

Expand((1+2*x)^(2^16)) mod 2.

@pzwp The difference between expand and Expand is in the order of evaluation. With

expand((1+x)*x) mod 2

the expand is done first, then the mod. With

Expand((1+x)*x) mod 2

the mod is applied to the factors before expanding. Compare the difference in the amount of time between

expand((1+2*x)^(2^16)) mod 2

and

Expand((1+2*x)^(2^16)) mod 2.

@Alejandro Jakubi Surely it is a bug that when such is placed in a procedure, nothing happens---no error message, no response, nothing.

How do you get those Typesetting error messages?

@Alejandro Jakubi Surely it is a bug that when such is placed in a procedure, nothing happens---no error message, no response, nothing.

How do you get those Typesetting error messages?

You can enter the expression with unevaluation quotes:

'((D-2)^2)(f)(x)'

Note that function definition should be done as f:= x-> ..., not as f(x):=.

You can enter the expression with unevaluation quotes:

'((D-2)^2)(f)(x)'

Note that function definition should be done as f:= x-> ..., not as f(x):=.