Suppose I have an ODE:

diff(f(x,y),x$2) + diff(f(x,y),x) + diff(f(x,y),y);

now I want to re-scale the equation so z and x are given in terms of normalised lengths (zeta,xi)

xi=x/x0;

zeta=z/z0;

where x0 and z0 are constants.  On paper this would be written as a chain rule i.e.

df/dx = df/d(xi) . d(xi)/dx

I can't figure out how to get maple to do this for me using any for me.

Cheers

How can we obtain with Maple the list of the variables of an equation? For example r^2-3*s^2+2*t^2 = 0 and y = (sqrt (u^2-5)-7) / surd (u^3-6*u2,3) have respectively for variables [r,s,t] and [u,y].

Thank you

So, i've got an expression like this:

f = -1/n/n1*sqrt(-n1*n*K^2+K^2*n1^2+n1*n^2*L-L*n*n1^2) + z

(that's what the maple output is. it might make more sense to rearrange it as  -sqrt(-n1*n*K^2+K^2*n1^2+n1*n^2*L-L*n*n1^2) / (n*n1) + z )

Is there a way i can factor out n1 from each term within the sqrt, split the sqrt into 2 sqrt's (so, -sqrt(n1) * sqrt(blahblahbalh) / (n*n1)) + z and then put it in the final form -sqrt(blahblahblah) / (n * sqrt(n1)) + z ??

Dear all,

I am using the linux version of Maple 12. I am currently working on something that needs a lot of observation by eye, and it would be extremely helpful if I could color some of the output in a different color (red for example). To be more precise, my output is series of numbers, so I would like if some of them satisfy a certain condition, they should be colored red.

Is something like that possible with maple? When it comes to color, the help pages only talk about plots, which is not what I need now.

Thanks a lot in advance.

Have atached a question in a worksheet. Thanks for your help :-)

Yours

Gustav

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Hi !
(Scuse me for my English, I'm French...)


How can I solve a system of 3 nonlinear differential equations of the second order  with Maple ?

(Like this one : http://physique-ricochet.societeg.com/images/equationsMvt.jpg  where Z, X and teta are the variables). So the variables are dependent.

I've started trying with Maple Help to solve the system composed of the first two equations and making teta a constant, but it gives me back :

ok, I have the following code but I want the Maplet to remain when I click on Ok (I only want it to plot and not shut down so I can

select more options from the list and plot more) so this Shutdown(['D1']) command should be removed but I dont know

what I should have there instead ?

Is there a convenient way to express a 2nd or higher derivative, say in an eval statement, so that it is not confused with an expression containing an exponent?

how do i find the singular value decoposition of a matrix in maple 12
i need the left and right singular vectors as well as the singular values

Hi, I'm supposed to find the center and radius of the circle given by the equation: 2x^2+2y^2-6x+10y=1. I know I'm supposed to complete the square first but i'm not sure of the process

Hello, I've been having trouble plotting multiple hyperbolas of the for xy=c on the same plot. Basically I'm supposed to plot several hyperbolas of that equation when c=+-1,+-2,+-3 on the same plot. If anyone can help i'd really appreciate it. ^^;;

how do I use maple 12 to solve this equation

I need help please

y"  + y = f(t) , where f(t) =        0,    0<= t < pi

                                                   1,   pi <= t < 2pi, y(0)  = 0 , y ' (0)  1

hi everybody.

i want to know what command convert "exp" to "hyperbolic functions".

for ex :    e^(x)+e^(-x)  -->  2cosh(x)

please help me.

Hi everyone,

does anyone know how to use the LagrangianMultipliers function so that the solutions obtained will be the closest integer smaller than whatever the output is for each entry in the list.

e.g.

LagrangeMultipliers(x1*x2*x3*x4*x5*x6*x7, [x1+x2+x3+x4+x5+x6+x7-32, x1^2+x2^2+x3^2+x4^2+x5^2+x6^2+x7^2-160],[x1,x2,x3,x4,x5,x6,x7]);

will give us entries which are not integers, and if i use other conditions I will sometimes not receive any integer solutions - which is to be expected.

Any help would be warmly received.

Thanks,

Alex