I run the attached Maple code, but no how long I wait, I can't run it. Is the code wrong?!
Maple file is word command file.

shro.mw

shrodin01.docx

@acer 

 If I ask the question again here are those who see?

Because I can't run with a series of changes I make in

@mmcdara 

 I really appreciate it.

 First of all, thank you for your time. If it is possible to add the file that I attached to the program, you would be very kind to me.

 I desperately need this app just to get some work done. I do not intend to disturb.

sh01.docx 

@mmcdara 

Hi,

  I'm so grateful, This was very kind of you.

You can look again at the two codes below to see what is wrong with the fsh code? (Of course if you can)

  fsh.mw

@mmcdara 

 Thanks for your hard work on this,

• I want to convert equation 9 to equation 12 with a series of changes and then solve it, i.e. equation 12.
• By substituting equation 4 and using equation 14 (that is, assigning the values of p_i, q_i to 1 or -1 or i and i -) and then inserting the unknown values (i.e. a_0, a_1, b_1) into equations 12 obtained, then by placing them, we get the value of the unknown function.

sh.docx

@mmcdara 

Thank you for your time to will solve this code.

@mmcdara 

• This equation (Eq.9) is a differential-difference equations, (u_n are recursive relations).
• i,It is for: It is a complex equation.
• DNSE The name of the equation is: the discrete nonlinear Schrödinger equation (DNSE).
• Equation 9 is converted into an equation with a real part and an complex part, written separately, using deMoivre's formula.
• We consider that equation 4 is a hypothetical solution for equation 9.
• And m is a balance number, which here has a value of 1.

Is the explanation better now?

@mmcdara 

Thankful
I want to solve the equation eq with several substitutions (substitution of the functions u , u _n +1 and u _n -1).
And after placing and simplifying, I will reach a polynomial to get the unknown values and then by placing them in the u equation, I will get the solution of the equation.

I wrote the last two commands to get the coefficients.

Can you guide me in this field.

@mmcdara 

 Sorry, If the number of equations is more, we call such devices overdeterminate and it is possible that they have a unique solution or that they do not have any solution.

@mmcdara 

 Well, only these 4 are unknown? Of course, alpha and beta can also be written?

In other words, did I make a mistake and is it practically impossible?

@mmcdara 

 Thank you very much
It is now running on version 2022.
One question, how can I get the values of a0, a1, the rest of the unknowns?
I only know the following command
Sol := solve(Eqs, {c, a[0], a[1], b[1]})
  I don't know how to write here!!!

@mmcdara 

 No, thank you very much for your precious time to answer.
I ran the program, it didn't run, I sent you a private message,But I don't know why it wasn't sent.
Again, sorry if you are upset.
And thank you very much

@acer 

Yes, I got it.

Thanks, 

@C_R 

 Thanks,

@Axel Vogt 

 ok