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These are questions asked by kencom1

Hello everyone, 

         Anyone with the solutions to the error code "Error, unable to compute coeff" should please help. 

         Attached below is the code.

         Thanking you in anticipations for your prompt response.

Goodday sirs, 

            How can I get over these error




(int((1/6)*(eta-s)^3*(S*(s*f[i](s)+3*(diff(diff(f[i](s), s), s))+(diff(f[i](s), s))*(diff(diff(f[i](s), s), s))-f[i]*(diff(diff(diff(f[i](s), s), s), s)))+M^2*(diff(diff(f[i](s), s), s))), s = 0 .. eta))/(1+1/y)


G := (int((eta-s)^3*(S*(s*f[i](s)+3*(diff(f[i](s), `$`(s, 2)))+(diff(f[i](s), s))*(diff(f[i](s), `$`(s, 2)))-f[i]*(diff(f[i](s), `$`(s, 3))))+M^2*(diff(f[i](s), `$`(s, 2))))/factorial(3), s = 0 .. eta))/(1+1/y)


f[0] := (1/6)*s+(1/6)*s^3:

for i from 0 to n do f[i+1] := (1/6*(-eta^3+eta))*subs(eta = 1, diff(G, `$`(eta, 2)))-eta*subs(eta = G)+G; f[i+1] := subs(eta = s, f[i+1]) end do

Error, final value in for loop must be numeric or character



Anyone with useful informations please.

Thanking you in anticipation for a favurabke response



Good day Sirs;

     Please, anyone with informations on the error "Error, (in dsolve/numeric/bvp/convertsys) unable to convert to an explicit first-order system". I can't understand what it means.

     Attached below is the code.

    Thank you in advance.

Hello everyone,

  How do I go around this PDE. I think I have input all the necessary required but its given the error code "Error, invalid input: subs received [beta = .5, v = .5, v__l = 1.0, eta = 1.5, false], which is not valid for its 1st argument". 

Below is attached the code.

Please, anyone with any information should help. Thanking you in anticipation.

Good day sirs,

         I am trying to solve this system of equations attached below, but got the following error message "The use of global variables in numerical ODE problems is deprecated, and will be removed in a future release".

       Anyone with useful informations please.

       Below is attached


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