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Saha

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2 years, 244 days
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Error, index must evaluate to a name whe...

Saha 75 Maple 18
syntax homework differential-equations
April 07 2023
1 3

ADM-1.mw

I need a help for solving this non linear equation by Adomian Decomposition Method.How to find A0,A1,A2... and u1,u2,u3 and a series.I am getting this error,Please help me.
> 

restart
> 

PDEtools[declare](prime = x);

`derivatives with respect to`*x*`of functions of one variable will now be displayed with '`

 (1)
> 

equ1 := u[tt] = 1/2*(u[xx]+u[yy])+u^2:
> 

ICS; u(x, y, 0) = 1, u[t](x, y, 0) = e^(x+y), lambda = 0, u[0] = 1+t*e^(x+y), F(u[0]) = u[0]^2
> 

for n from 0 to 5 do A[n] := d^n*[F*(sum(lambda^i*u[i], i = 0 .. n))]/(factorial(n)*`dλ`^n); u[n+1] = (1/2)*int[diff(sum(u[n], n = 0 .. 5), x, x)+diff(sum(u[n], n = 0 .. 5), y, y), t = 0 .. t, t = 0 .. t, dt*dt]+int[A[n], t = 0 .. t, t = 0 .. t, dt*dt] end do
> 

``

Download ADM-1.mw

How do I solve this ODE?...

Saha 75 Maple 18
ode differential-equations
March 26 2023
0 0

I need help to solve this ODE,

I didn't get series values F(k+3),Theta(k+2),phi(k+2),error comes in summation values.and

How to find the unknown parameters A,B,C.

 TLF.mw

How to Solve Error, (in dsolve/numeric/b...

Saha 75 Maple 18
February 11 2023
1 0

Please Help,

I am trying to plot some movement equations, but the following error keeps happening:

Error, (in dsolve/numeric/process_input) system must be entered as a set/list of expressions/equations

when I tryed to rewrite the equation the error became:

Can someone help me with those errors?

Here is the code

pp.mw

How to Plot this ?...

Saha 75 Maple 18
ode homework dsolve
January 31 2023
1 0

Please Help!  The flow gets me like this,Where should i fix this problem.The flow changes for me fluctuate through the series range.What to do to get upflow in f(eta) and downflow in theta(eta)

 MVP.mw

Problem with solving Pade approximant al...

Saha 75 Maple 18
plotting mtm incomplete-question
January 04 2023
1 0

 How to rectify the Error, (in MTM:-findsym) invalid input: a string/name list is expected for sort method `lexorder`   .Could you please help me to plot the curve.

TC1.mw

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