Hello mathematicians :)

I have a problem finding the inverse of the following 12x12 matrix:

C:=Matrix([

[ 1, x1, y1,    x1^2, x1*y1, y1^2,      x1^3,    x1^2*y1, x1*y1^2,   y1^3,      x1^3*y1,   x1*y1^3],
[ 0,  0,  1,       0,    x1, 2*y1,         0,      ...

> solve({G*{(1-v)*s1+v}+H*{(1-v)*s2+v} = n1, G*{(1-v)*s1*w^s1+v*w^s1}/w+H*{(1-v)*s2*w^s2+v*w^s2}/w = -p*(1+v)*(1-2*v)/(e*w^beta)+n2}, [G, H]);
print(`output redirected...`); # input placeholder
Warning, solutions may have been lost
                                     [] 
 

Does maple use the acml,

it is almost that in every version the Intel MKL is the latest

I want to plot three cumulative normal distributions. I know the parameters mu and sigma from each function. If I give the commands 

f:=int(1/sqrt(2*Pi)/sigma*exp(-(x-mu)^2/2/sigma^2),x);             1

plot(subs({mu=0,sigma=1},(1)),x=-4..8);

I get a 2d-plot. But I want to illustrate, how functions can be moved in space. In the 2d-plot, the x-axis illustrates the values of the random variable and the y-axis illustrates...

I wrote some code involving chrem that broke in a recent version.

> y := Vector([0]):

> yp := Vector([1]):

> trace(chrem);

> chrem( [y, yp], [1,3] );

{--> enter chrem, args = [Vector(1, [...], datatype = anything), Vector(1, [...], 
datatype = anything)], [1, 3]
                                        n := 2

                                    v, m := [0], 1

                                        v := 0

I am trying to find a way to programmatically start a Maple animation, specifically after a custom button has been pressed.

Equivalently, I would be happy with being able to pass an option do "display" function, so that when I use it to create an animation, it is running from the moment it appears on the screen.

Any hints will be greatly appreciated.

HI DR. Kamel Boughrara,

I am trying to understand the analytical magnetic field modeling of slotless PMSM, but it would be of great help if you could define the variables, like  mp =3,  QS=24, ap=1, p=2, q= QS/2*p*mp, tt, Qt and pls also iMX=10,  I am attaching the code for your kind answer.

Thanks

A.Q 

codetounderstand.mw

Let a function f be defined on the set of all real numbers and satisfy the relation
f(x+y)=f(x)+f(y)+80*x*y. How to find f(4/5) with Maple if f(1/4)=2?

Thanks Markiyan and Dr. Kamel.  Dr. Kamel I went through the link you gave me but couldn't find how to solve poissons equation using separation of variable method using Maple14.  I am attaching my file for your kind consideration.  Pls suggest me how to solve. 

Thanks in advance

A.Q

Poissonequation_solu.mw

Hi all,

I have to solve a ODE stated as follows:

PDE := expand(Laplacian(u(r, theta)) = M[r]/r)

But the problem is I don't know how to define M[r],  which is summ of "M[n]*cos(n*p*theta), where n is 1.3.5, 7...infinity

I f i write it precisely its  "summation of M[n]*cos(n*p*theta), where n =1.3.5, 7...infinity. 

Thanks in advance

A.Q

Hi, I have not found a post that explains how to create a colorbar for a contour plot with or without filled regions.  At the moment, I manage to create a color bar manually as follows.

First, I plot some function like so,

plots[contourplot](i/(1-(1+i)^(-n)), n = 15 .. 30, i = 0.1e-1 .. .15, axes = frame, contours = [seq(0.1e-1*n, n = 5 .. 16)], filledregions = true, axis[1] = [location = low, gridlines = [10, majorlines = 1]], axis[2] = [location = low, gridlines = [10, majorlines = 1...

In the following worksheet I want the plot, but Maple can't generate it . I tried two ways-the first one took almost 40 minutes and gave an empty plot, the second one took almost 10 minutes and generate an incomplete plot.Also the integration is very slow,but still,it can do it.

So,can anybody help me with a better way to do things-using other numerical schemes/advanced plotting options-whatever it takes?    Or at least explain what is going on?

By...

i use maple 12

with(PDETools):

U := diff_table(u(x,y)):

declare(U)

error, (in PDEtools:-declare) cannot declare objects as U

I have found out that you can change the attributes of a style via Format/Sty;es, clicking the style in the list and then clicking the Modify button. This only seems to last for the lifetime of the current worksheet.

Was wondering if there was a way of making the change stick, i.e. so you can close down Maple, open it up again and still having the style change applied ?

I'm using maple 13.

The expression that I paste below is quite large and subsequent expressions are also swelling. This is causing maple to slow down and in some instances I get a message saying the kernel has disconnected (maple just times out) I want a way to programmatically reduce the size of the output. I have tried simplify(expr,size) and this has helped some. I don't want to use simplify(expr,symbolic) because of the presence of the square roots. Is there...