## 7 Badges

9 years, 158 days

## Problem in Solve Command...

Maple

Dear All

I have updated my Maple 18, I am surprised to see that ordinary "solve" do not work and return error massage like;

"Error, (in coulditbe) invalid input: `coulditbe/internal` uses a 1st argument, obj, which is missing"

or like;

"Error, (in solve) invalid input: hastype expects 2 arguments, but received 1"

I am totally confused !!!

Can anybody help me out please !!!!

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Download Solve_Command.mw

Regards

## Reading Maple third party package...

Maple

Dear All

I have third party Maple package saved along path E:/Maple work/General Maple Workout/TWS.mpl, but after using march command for other package, Maple is reporting error like "unable to read; E:/Maple work/General Maple Workout/TWS.mpl". What could be possible reason for this?

Moreover when I type "currentdir()" it shows me "C:\WINDOWS\system32" which is right path from where Maple is working

Regards

## Collecting coefficients in differential ...

Maple

Dear all

I have problem related to collection of coefficient of differtials in differential expression containing multiple dependent variables and we want to collect coefficient wrt to selected dependent variables. Please see attached Maple file for details.

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 (1)
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 (2)

Suppose we differential expression like:

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 (3)

We can collect coefficients of differential like in following manner:

 The Procedure

Now how can we collect coefficents with respect to so that differential expression (3) appear as

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Download Collecting_Coefficients_in_Differential_Expression.mw

Regards

## Third party packages of Maple...

Maple

Can anybody where I can find collection of third party Maple packages?

One site that I know is

http://cpc.cs.qub.ac.uk/

Regards

## Coefficients in differential expression...

Maple

Dear Friends

In differential expressions(See Maple file) how to find coefficiets of dependent variable "u(x,t)" and "v(x,t)" and of their differentials ? There is command "dcoeffs(function)", but that work for single dependent variable only but in our case there are two dependent variables in consideration. There are other options like "indets", "specindex" but those do not work.

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 (1)
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 (2)
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 (3)

In above differential expressions how to find coefficiets of dependent variable "u(x,t)" and "v(x,t)" and of their differentials ? There is command "dcoeffs(expr,u(x,t))", but that work for single dependent variable only but in our case there are two dependent variables in consideration. There are other options like "indets", "specindex" but those do not work.

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Download Coefficients_in_differential_expression.mw

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