## 290 Reputation

9 years, 160 days

## How I can display particular term from s...

Maple 18

Dear All

Suppose I have a expression whose terms are in summation:

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 (1)
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 (2)

In above summation, how I can write specific term ? For example, how I can display term for etc.

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## Does TWS command of Maple solves system ...

Maple

Dear all

I am trying to solve system of ODEs by TWS command for traveling wave solution, but an error is showing. When I enter sinlge ODE or PDE the command does not show any error. Why it is showing error for system of ODEs ?

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## How to use ToJet command when differenti...

Maple 18

Dear All

I am stucked at converting an differential expression in Jet notations. Maple is giving error as  expression contains composite derivatives. Please see attached file.

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 (1)
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 (2)
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 (3)
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 (4)
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 (5)
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I guess ToJet is not working in case of composite function.

But how I can  display derivatived as

## How to substitute values from multiple l...

Maple 18

Dear All

For six parameters, I have corresponding list of their values and there are eight values for every parameter. I need to put these values in a formula to obtain a list of output values. There are two formulas one for 'P' and next is for 'RL'. I have used value of 'P' to calculate value of 'RL'. There are some complex number too, for which I have used modulus and final value is calculated by using 'evalf', but this command is not returning proper values for list as required. But this command works fine when I use single value from every list to calculate RL.

The Maple sheet attached herewith.

List.mw

Regards

## Why Coefficient command giving me error ...

Maple 18

From differential expression I am trying to extract coefficients corresponding to given indets, but the coeffs command is giving me error as "invalid argument to coeffs"

For example for worksheet titled "[852] Determining Equations using Prolongation" the error is showing for expression (9).

Whereas the same command in worksheet titled "[411] Determining Equations for Variable Coeff KdV(Reviewed)" is working okay and is giving desired result at (16).

I am running both worksheets in Maple 18.

[852]_Determining_Equations_Using_Prolongation.mw

[411]_Determing_Equations_for_Variable_coefficient_KdV_(reviewed).mw

Regards

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