hey,

does anyone know how to find a cross multiple of 2 del vectors (delf and delg)?

they each have 3 variables x.y.and z.

thanks

 

i been stuck on the attached files for days and i'm stuck on the regression line

Hi,

I tried to get a 3D "surface" plot (comapreable to a matrix surface plot or matrixplot) of a list in the form:

[[xi,yi,zi],....]

where xi are the x-data, yi are the y-data and zi are some velocity data. Unfortunately I found only the possibility to draw a pointplot3d. Maybe anybody can help me.

Thanks

Dirk

<p>Hello! Its my first post.</p>
<p>I have been able to modify an example program. It uses the || operator to accumulate data into an object in the form of multiple polygonplot(...) objects. After the loop exits, I can do something like "display(obj1, obj2...)" and everything is displayed.</p>
<p>What I would like to do is instead of accumulating the data first, execute the commands to display from inside the loop of the procedure. This would hopefully eliminate the time lag before starting to draw, as well as allow me to draw more things.</p>

If my numbers is a decimal point, do i have to revert it to a whole number

Hi,

I have this taylor series expansion:

> taylor(exp(-x)*sin(x), x, 11);

Now I need to do a legendre economization. So I want to write x, x², x³ etc (from the taylor series) as linear combinations of the Legendre polynomials. My idea was to simply write something like:

>solve({aP(0,x)+bP(1,x)+cP(2,x) = x²}, {a,b,c});

This is supposed to give coefficients for the legendre expansion of x². This doesn't work because it gives solutions in terms of x, which is useless to me. Is there any way?

Good Morning, I´m sorry, but be unable to write English. I have following problem:

I need draw curve.

This is all right:

with(DEtools); with(plots):

r1 := diff(x(t), t) = (x(t)-y(t))/sqrt(x(t)^2+y(t)^2);

r2 := diff(y(t), t) = (x(t)+y(t))/sqrt(x(t)^2+y(t)^2);

sys := {r1, r2};

DEplot(sys, {x(t), y(t)}, t = 0 .. 1, x = -1 .. 1, y = -1 .. 1, stepsize = 0.5);

I am running Maple 12 in OSX. I am trying to calculate the order of a group. I know my group is finite, but is very large. The environment variable _EnvMaxCosetsToddCoxeter is set by default to 128000 (see help pages: group,pres) but I need it to be much higher. Does anyone know how I could go about changing it?

hi everyone,

I've heard there's a possibility to plot graphics with scrollbars attached to them. These scrollbars allow for modification of the parameters of the given function and the following instant graphical results .

any ideas  ?

Thanks in advance,

Yoeri.

 

Here is my code but I'm having trouble getting it to work

d := sigma(m)-m; Amicable := proc (m) local n; for m from 2 to 100000 do n := d(m); if d(n) = m then print*m, n end if end do end proc

Would appreciate any advice you guys might have.

Thanks.

Suppose I solved for an arbitrary

because i'v got error like this "can only numerically solve PDE with two independent variables, got {x, y, t}"

 I have been provided with a sequence defined as such,

a_0=1 and b_0=1/surd(2,3)

a_n+1=(1/3)*(a_n+2*b_n) and b_n+1=surd((1/3)*(b_n*(a_n^2+a_n*b_n+b_n^2)),3)

and have been asked to come up with a loop to check the value to which both {a_n} and {b_n} converge.

How do I go about doing this?

Thanks for the help in advance.

Maple not working don't know what is wrond????

 

HELP!!!

 

http://www.mediafire.com/?nbzczfmyyro

I have a nasty expression that solves for eigenvalues of pressure & shear waves propagating along an interface between 2 elastic media.  There are many roots to this expression for eta, but many of them can be excluded because the material properties are both REAL & POSITIVE.  I am very new to MAPLE & I am attempting to get it to solve for the roots where all of the other parameters meet the conditions of REAL & POSITIVE but I am not sure I am doing this correctly because MAPLE runs off to evaluation mode & takes so much memory my computer slows to a crawl &