Hi,

I need help of your expertize in solving the following queries:

I would start with a sample equation:

Eq1 = u_{xxxx} + u_{xxyy} - v_{xxxy} - v_{xyyy} 
where u_{xxxy} represents 4th order pde of u i.e. d^4/(dx^3 dy).

I get a equation similar to Eq1 (but quite complicated) on solving the 
equilibrium equations. I would like to collect the similar derivatives
for variable u and v together like

Eq2 = d^2/d x^2 ( u_{xx} + u_{yy} ) - d^2/dx dy ( v_{xx} + v_{yy} )

Why does Maple Italicize every letter I type whenever I create a new file?

Is there a way to disable this automatic italicization?

How to work out this integral

I have a problem with dsolve that is explained bellow:

In Maple 14, I get the following result
restart:
eqts:=diff(u(x),x$2)=-M(x)/EI;
                     d  / d      \     M(x)
                    --- |--- u(x)| = - ----
                     dx \ dx     /      EI 
cnds:=u(0)=0,u(l)=0;
                       u(0) = 0, u(l) = 0
M:=x->piecewise(x<=l/2,P/2*x,-P*(x-l)/2);
              /     1    1        1          \

hi, could You help me to write script(program) with maple( maple 13) exercise....?

1) The velocity of a freely falling object near Earth's surface is described by the equation
dv/dt=-g     (1.1)
where v is the velocity, g=9.8m/s^2 . Write a program that employs the Euler method to compute to solution to (1.1); that is, calculate v as a function of t. For simpilicity, assume that the initial velocity is zero-that is, the object starts from rest-and...

Hi and thank you for looking.

I have recently begun advanced maths and need help with maple. Is it possible to input an algebra equation and have maple rearrange it to make it a different subject?

I am new to maple and maths again so any help much appreciated. 

Also can maple for example if I input 6 equations could it or is there a way to get maple to pick two like equations out of them.

Thanks again, Danny 

Hi and thank you for looking.

I have recently begun advanced maths and need help with maple. Is it possible to input an algebra equation and have maple rearrange it to make it a different subject?

I am new to maple and maths again so any help much appreciated. 

Also can maple for example if I input 6 equations could it or is there a way to get maple to pick two like equations out of them.

Thanks again, Danny 

I wrote a module that has quite a few commands in it. I want to make a help file for it so that when you type something like ?mypackage, something like this will pop up! thanks in advance!

So, I am reading the blog post about Mean Absolute Deviation portfolio optimization that

http://yetanothermathprogrammingconsultant.blogspot.com/2010/04/portfolio-from-qp-to-lp.html

claims that the traditional portfolio optimization problem can be expressed as seen below:

I am not sure however that it is 100% correct for example you have (r[i,t...

Download jan022012.mw

Dear Prof

i need a maple code for solving non linear equations by variational iteration mthod.please help me in this problem.

with best regards

hamed daei kasmaei

email:hamedelectroj@yahoo.com

I need to solve the below nonlinear equation for n numerically, assuming taut and taum are between zero and one, not inclusive of zero and one. 

I first used "solve(EQN,n, useassumptions)assuming taum>0, taum<1, taut>0, taut<1;", but no solution was generated. I thus removed useassumptions, and used "solve(EQN,n);", but I received the message "Warning, solutions may have been lost" from Maple. How to solve this problem?

Hi.

Some times ago, I have asked about possibility to solve multilayer transient heat transfer problem.
The problem was solved originaly by Robert Israel. I enclosed his solution and explanation in file Xpde_oryginal.mw.
Thank's Robert!


There was a problem with correct results of numeric PDE in Maple 14 when I have used convection and radiation BC toogather. However Maplesoft have removed this bug in version 15, thus now I have obtained right results...