Hi all,

> deq := diff(theta(t), t, t) = -g*sin(theta(t))/L;

                           2                              

So, Maple is quite helpful in that it will automatically make certain simplifications for me.  But what if I don't want it to.  For example, if I enter 2*(2+x), how do I get it to not just simply return 4+2*x?

 

Consider this to by end goal:

evalb(2*(2+x) = 4+2*x) => false

I have some troubles in solving a system of three trigonometric equations using the function 'solve' of Matleb.The program finds three solutions but a message of 'Warning: Warning, solutions may have been lost' also appears. Does it mean that there are other three solutions? If yes, how can I see also these three numbers?

Thanx!

In particular because the TAB key doesn't work in Maple, is it possible to define a shortcut key for a few spaces? I found this quite annoying that I couldn't simply tab over a few spaces when programming. Is Maple going to fix it in the future? Why doesn't TAB work anyway, did they forget about it?

I have a particular system of partial differential equations to which I want to apply a change of variables involving square roots using PDEtools[dchange]. The result turns out to be not in a simple form due to the square roots. Why is this so ? Is there a better way solving the problem than the one I am suggesting below ? The system of partial differential equations of interest is the following:

Hi all,

While solving a différential equation, I encounter an integral:

 

Anyone know a slick way to change the arguments of a function to possibly different things depending on what they are?

 

Let's say I have objects a, b and c.  a and b are of type function and c is of type set.  F is another function object.

 

F(a,b,c) is defined.

 

What I want to do is construct F(g(a),g(b), h(c)).....

 

Ideas?

solve used to be one of Maple's strongest commands -- it even subsumed simplify in power.  But, over the years, dsolve slowly took over as the most powerful comand.  At the same time, people started realizing that within the framework of differential equations, the toolbox was actually larger than the one for algebraic equations (and most algebraic tools are still available).  So many tasks that one thinks of doing purely algebraically can also be done using differential equations, with perhaps the most surprising one is to factor multivariate polynomials via partial differential equations.

Reduce::nsmet: This system cannot be solved with the methods \
available to Reduce. >>

 

Hi, I'd like to know where's maple directory by default on my computer. I just found a program that would really help which is run on maple. I will join the read me file of the program i want to install.
The unclear part for me is "  (b) Copy the file dot.mapleinit in the Bethe root directory into your
    home directory where it is read in from MAPLE      cp dot.mapleinit ---> [user-home]/.mapleinit"

For t := x^(1-I), f := arcsin(t) + arcsin(1/t) i have problems with

  dd:= PDEtools[dpolyform](y(z)=f,no_Fn);

                           d
                    dd := [-- y(x) = 0] &where []
                           dx

Hi all

Hi everybody.

 

Hey guys,

I am struggling again trying to solve very similar pde in Maple V.

pdesolve(-a*u(t,x)+diff(u(t,x),t)+(c^2)*b*(1/t)*[log(2*T/t)]^(-b-1)diff(u(t,x),x,x)=0,u(t,x))

Could anybody try running it in the older version? Are there any solutions?

Thank you,

Vilen

Hallo Everybody,

I hope someone can help me.

I want to solve numerically the diffusion equation,

          diff(csh(rh, t), t) = Dif*(diff(rh^2*(diff(csh(rh, t), rh)), rh))/(r0*rh^2)

          where "Dif" is the diffusivity and "r0" is the initial value of rh (the equations were normalized).

subject to the following boundary and initial conditions: