How to find the limit limit(u(x,t),t=infinity), where u(x,t) is the solution of the Cauchy problem:
pde:=diff(u(x,t),t)=diff(u(x,t),x,x)+exp(-t) with the initial condition
ic:=u(x,0)=arctan(x) ?

How to solve this problem:

 style = line option is not executed within the command Statistics [PointPlot].

 But right click on the graph Style / line is obtained as expected. Except that when you run the initial command, Statistics [PointPlot] ... back to the previous graph.

hi

i have the following ode

.7246228659*(diff(f(x), x, x, x))+f(x)*(diff(f(x), x, x))+.6666666666-.6666666666*(diff(f(x), x))^2

with boundary conditions

f(0) = 0, D(f)(0) = a, (D(f))(b) = 1   (b corresponds to infinity and we can assume it 4 or 10 such that the solution converge)

i know the the solutions exist up to a critical value of "a" that beyonds no solution exist. for example for the following ode the critical value is...

Hello!

I'm currently trying to program Euler's Nummerical Method to solve a second order differential equation, that I've split into two parts: 

f1:=v:

f2:=-(0.006549/0.7038)*v-sin(x/1.03)*9.82

In an attempt to solve this equation by using Euler's in Maple, I typed in the following commands: 

EulerSystem:=proc (f1,f2,t0,x0,v0,h,n) local t,x,v,i,p;
t[0]:=0; x[0]:=x0; v[0]:=v0;

Hi,

I would like to have logical operator which will spit out true if my variables are proportional to each other, something like:

a:= A*some*other*stuff;

b:=A;

evalb(a ~ b);

gives true

Is there an easy way to do this? 

Greetingsi

Maple does not simplify the expression -2*Pi*sin(Pi*a)/(-1+cos(2*Pi*a)). How can I make it do so? 

Thanks,

Maple 15 64-bit on Windows 7

Hi! I'm running Maple 15.01 64Bit on my Xubuntu 12.04.

I also got Maple 15 installed on my Windows7 64Bit computer to verify the results.

So let's see what is going wrong:

What does work?

int(x^n, x);

Gives me on both machines the correct result:

Hello. I wanted to solve a parametric 16*16 determinant. My first question is, whether or not it can be solved?! after that when I tried to open my work in progress I got the following message: "
There were problems during the loading process. Your worksheet may be incomplete". Could someone help me recorver my work? Thanks in advance.

Hello,

we have to create program which shows chemical concentration changes, but this concentration depends on time and distance along the longitudinal axis. So we have to put numbers into the left side 41x41 matrix from 3 equations:

A:=1, B:=1,E:=0.2, Δx:=0.25,Δt:=0.025.


first when i=0;

I want to omit the independent variable

for example:

> alias(f = f(x+y, z+y));
print(`output redirected...`); # input placeholder
                               f
> f1 := z = f(x+y, z+y);
print(`output redirected...`); # input placeholder
       ...

How to edit the tex generated by the maple:Put the one equation into several rows

For example

This code p57.txt  can get the below picture

[IMG]http://i730.photobucket.com/albums/ww309/ytyyutianyun/1-13.png[/IMG]

But what I want is

[IMG]http://i730.photobucket.com/albums/ww309/ytyyutianyun/2-7.png[/IMG]

Thanks

Hello everyone.

an equation or a table can have a label and can be later referred to by using insert->label. Can we do the same for inserted images? Like Figure 1, etc.... A workaround is to insert the image in a 1x1 table and reformat the caption. But I am not sure that's the ultimate solution.

Another related question: can an equation that is just in the 2D math mode that is not meant for execution get a dummy label like (*) or (**) or something like that?

Based on the title, once again I'll mention that the programm that I have been made by using

Maple14 could not run faster.

The function of Maple should be running effectively compared to others.

Hereby, I'll attach the programm for your further action.

That's all, thank you.

p57.txt

This is my code help thanks

Dear All,

Further to my previous question on this forum "How to write data from a matrix while choosing the format?", I would like to update it by adding a complex number. What is the easiest way to deal with that?

Here is the file (that does not compile): writedataMatrix.mw

> driver := proc () local A, B, x, f, g, i, j, format, fd:

A := Matrix(3, 3):
f := 1-2*I:
g := evalf(sin((1/5)*Pi)):