I have to solve the following set of equations. But it allways appears the Error "recursive assignment". Has somebody a solution for me? Is there a Problem with the Equations?

DGL1 := m[1]*(D(D(x[1])))(t)+d[1]*((D(x[1]))(t)-(D(x[2]))(t))+c[1]*(x[1](t)-x[2](t))+e^(-0.4e-1*t)*sin(t)+1.5 = 0;
DGL2 := m[2]*(D(D(x[2])))(t)+d[2]*(D(x[2]))(t)+d[1]*(DF[4]-(D(x[2]))(t))+c[2]*(x[2](t)+x[f])+c[1]*(F[4]-x[2](t)) = 0;

init := (D(x[1]))(0) = 0, x[1](0) = 1.5, x[2](0) = 5;

How to solve the equation 2017*x^2013+2015*y^2013-2033*z^2013-2011 = 0 over the integers with Maple?
I tried it with the Direct Search v.2 package:
>with(DirectSearch):
>SolveEquations([2017*x^2013+2015*y^2013-2033*z^2013-2011 = 0], {z > -100000, x >= -100000, y >=-10000, x<= 10000, y <= 10000, z <= 10000, assume=integer, AllSolutions);

Okay so my proff wrote the following procedures to sort a list and they obviosuly work. Now I want to write a procedure that can merge two sorted lists (using SelectSort). I am trying to write merge as a procedure but to no avail. Can anyone help me out?

getListSize := proc (L)

local vv; vv := Vector(L);

return LinearAlgebra[Dimension](vv)

end proc

swap := proc (L, i, j)

local temp, vv;

vv := Vector(L);

Whoever is in charge of the question post management, please do not delete my question again without even notifying me. I have deleted the original post (which was a follow-up question to an old thread) so that my question can be viewed by others as a fresh post. Thank you!

Now to the question:

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Hi All,

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It worked OK until 15

thanks

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