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found differentiated functions with same name but depending on different arguments in the given DE system


eqn0 := diff(f0(y), y, y, y, y) = 0;



How to fix it?


I have the following in a text file.


When I read it in command-line maple, I am getting the following error.

on line 1, syntax error, non-ASCII character in unicode file 1:
Error, while reading `123456.txt`

Is it possible to input foreign characters in maple? (I dont want to enter directly in maple worksheet)

Currently I am running a maple engine using a java script and sending equations to the engine.

Thanks in advance.

Dear All,

I am new to maple and trying to write a recursive function with two input variables, but when i execute the statement it shows error "Error, (in B) too many levels of recursion"

Following is the set of instructions which i am trying to execute:

if n=1 then  




end if

After execution, i try to access B(1,1) or B(2,1), the following error occurs

B(1, 1);
Error, (in B) too many levels of recursion

I'll be grateful, if someone can help me to fix this problem. 

lambdaaaaaa.mwI have calculated lambda(s), now I to substitute  its derivative(1st,2nd) in b[2], b[3]and b[4] in order to calculate the values of constants i.e C1,C2 and C3, plz help

Say I have a funtion something like this



Now I want the above output to be saved to a .txt file having maple friendly format.


I want to solve numerically the PDE:

u_xx + u_yy= = u^{1/2}+(u_x)^2/(u)^{3/2}


My assumptions are that  |sqrt(2)u_x/u|<<1 (but I cannot neglect the first term since its in my first order approximation of another PDE.


So I tried solving by using pdsolve in maple, but to no cigar.


Here's the maple file:

PDE := diff(diff(u(x, y), x), x)+diff(diff(u(x, y), y), y) = u^(1/2)+(diff(u(x, y), x))^2/u^(3/2); IBC := {D[1](u)*(1, t) = 0, D[2](u)*(x, 1) = 0, u(0, t) = 1, u(x, 0) = 1}; pds := pdsolve(PDE, IBC, type = numeric); pds:-plot3d(t = 0 .. 1, x = 0 .. 1, axes = boxed, orientation = [-120, 40], color = [0, 0, u])

diff(diff(u(x, y), x), x)+diff(diff(u(x, y), y), y) = u^(1/2)+(diff(u(x, y), x))^2/u^(3/2)


{D[1](u)*(1, t) = 0, D[2](u)*(x, 1) = 0, u(0, t) = 1, u(x, 0) = 1}


Error, (in pdsolve/numeric/process_PDEs) all dependent variables in PDE must have dependencies explicitly declared, got {u}


Error, `pds` does not evaluate to a module





I created my own package and one procudure inside this package is to calculate the eigenvalues of a identity matrix, as shown below




Then, I use this package in another document, all other procedures work well except the procedure calculating egigenvalues, as shown below




How to solve this problem? Thank you.


Another newbie question...

I have an excel file with lots of named ranges. I can use the ExcelTools WorkbookData command to get a list of all the available named ranges, and then I can assign the contents of each named range to a Maple variable with the Import command.

I'm thinking that there must be an elegant way to create a Maple variable for each string in the list of named ranges and assign it to the contents. Something like looping through each named range in the list, creating a variable of that name, and then assigning the contents of that named range. I hope I'm clear without repeating myself too much.

Am I explaining my need?

Thanks in advance. This looks like a good forum, and I hope to be able to contribute someday.

Mike McDermott

i was to design a GUI using embedded components, i started as shown in the screenshot i uploaded but i had alittle problem trying to code the `evaluate at params` bottton i wanted the botton to return the evaluation of the mathematical expression at the value of the various parameters [delta,gamma,alpha,G,C] into the mathcontainer infront of it i.e evaluating at these points which can be change as new vualues are type in the textfeilds. such as

this is the code i used and it poping out an error message

use DocumentTools in

local f,q,delta,gamma,alpha,G,C;



end module;
pls i need some one to correct me

Hi all,

I write this code with some matricial calculations.

There are two important parameters N and Digits (in red in the code).

For N=8, I can do the calculation with Digits=10. For N=10, to get the results (without overflow), I should give Digits=30.

I want to do the calculation for N=100 and higher.

I do not know how to do this. I have a PC with 4G of RAM.

Thank you


While I am working with a problem , suddenly the message 'Kernel connection lost' appeared. After that I restarted maple and then I opened my work sheet again , but I lost all my equations and data in the work sheet. I dont know why? All my work is total empty. 

How can I recover the work sheet data? Solutions are appreciated.

I have attached the lost work sheet for your reference. 


Thanking you.



Hello All,

I looked through the Maple help on PDE systems and pdsolve and the physics problems that appear there. THere are a number of single-PDE cases with initial / boundary conditions; but I couldn't find PDE systems with ics/bcs.


Would you have a (simple) example of a PDE system with its initial / boundary conditions? I am attempting to build understanding of the syntax and different options of "pdsolve". Examples seem to be a great way to learn how to solve PDE systems. One can then pdsolve the PDE system without ics; then add them, try different options etc.


Thank you!


Hello everybody.

In the attached file, you find 6 equations. All of these parameters are known except "pd" and "qd". How can I find these two unknowns from 6 equations??? It should be pointed out that, "pd" and "qd" must contain "ud", "vd","wd" and "rd".

Thanks in advance.

I need a help about running the following codes..


c1:=sqrt((s)/Pi/r^3)/2 * (-sin(r*(u-1)^2/4/(s)+Pi/4)+sin(r*(u+1)^2/4/(s))/sqrt(2)):

c2:=Int(c22, y= 1..100):

c3:=Int(c33, y= 1..100):

g2:= unapply(Int(g1, r= 1..infinity, epsilon=1e-4,digits=7),u):
plot(g2, 0..10, numpoints=100);


Thank you!

VIM.3.mwHi,How do I make a graph and error table for exact and by using this method i.e VIM 

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