How do I change this equation with 28 variables

W:= 0.003000000000 x(1) + 0.004000000000 x(2) + 0.006000000000 x(3) - 0.006000000000 x(4) + 0.004000000000 x(5)   + 0.001000000000 x(6) + 0.001000000000 x(7)   + 0.004000000000 x(9) + 0.008000000000 x(10)   + 0.006000000000 x(11) + 0.01700000000 x(12)  + 0.002000000000 x(13) + 0.01300000000 x(14)   + 0.01200000000 x(15) + 0.006000000000 x(16)   + 0.001000000000 x(17...

I would like to compute the Lie algebra cohomology of a complex lie algebra g in a representation h/g where h is a Lie algebra containing g. is it possible?if yes, how. thank you.

Hi,

I used the dsolve command mentioned by Maple experts in the earlier blog to solve the following ode with bcs.

ode:= diff(y(x),x$2) + 1/x *diff(y(x),x) + 0.6*y(x) + y(x)^3 - y(x)^5  = 0

bcs:= D(y)(0) = 0,   y(d/2) = 0.8 * y(0)

The ode is a spherical coordinate system. The radius is defined by ‘x’ and the diameter by 'd'. 

The...

Hello!

I have a question about array/Array, as the picture illustrated, if applying a function to the entries of an array or Array, for example, map, then the results which maple yields lack of commas, as we can see, each entry in array/Array is so close and if the entries are very complex, then a confusion will be easily caused.

Is there any way to conquer it?

Hey peeps

I'm quite new to maple, and to this site, so I hope I do this properly.

I'm trying to make a procedure, that througout the procedure divides 2 numbers. But I need it to round down to the nearest integers, at all time, as I need an integer as output. I have searched quite a lot, and haven't found anything that helps me to do this.

The procedure is the following:

walla := proc (x) local y, z, w;

y := x;

Ques.mw In the WS attached,I want to specify that x1,x2,y1,y2 are real.I don't want the complex conjugate sign over the products in the hermitian conjugate matrix.

Also there are 2 examples of "Upper Shift" matrix- 3by3 & 4by4.I need a general index notation for this kind of matrix.(e.g. kronicker delta_i,j represents identity matrices).I tried with kronicker delta_i+1,j;but it doesn't give...

Hej!

I've some problems in factorising terms in an equation.

As one can see in the maple file below, the terms "cosh((1/2)*a+(1/2)*y)", "cosh((1/2)*a-(1/2)*y)", "sinh((1/2)*a+(1/2)*y)" and "sinh((1/2)*a-(1/2)*y)" recur in the equation. So want to factorise those terms, but it doesn't work with factor().

Does anybody have a solution, how I can simplify that equation?

test.mw

For a eqation such as y(t)=2*sin(3*t)

I want to solve its fourier series under the different step,

and plot corresponding figure like the picture below

How should i do?

help me please.

Hello,

I have spent all morning trying to create a surface plot from a set of survey data that I have. The data I have is in the format xi, yi, zi. It is in Excel in columns. I read some previous questions on this topic, but my plot just comes out all jumbled.  Here is what I coded.

As soon as I figure out how to post images, i will post the plot...

Hello!!

I have a polynomial where each element is of the form  L * x1^a * x2^b * X3^c *x4^d. I want to replace X3^c by a sum of other elements , the number of this elements depends on c.

Is this possible? if so how can I do it on maple?

Hope you can help, thanks!

I built the shock model in MapleSim

then I got the response accleration

For this curve, I want to solve its fourier series in Maple.

Do it work?

thinks in advance.

this is the msim file

test.msim

Have anyone toldl me how to find the family of curve at Maple 14

ax^2 + B*x*y+cy^2= D

with A=1, B=1, C =1 and D =2010

Portfolio Return Variance

I need help in defining and solving Portfolio Return Variance in maple

sigma_p = sum sum x(i)x(j) sigma(i)sigma(j)

where [sum(x(i)r(i) = r(p))]

and [sum(x(i) = 1))]

Please help

I am trying to use Markowitz theory to optimise a portfolio. At the moment I have got

> f := proc (x) options operator, arrow; piecewise(x = 1, 0.3e-2, x = 2, 0.4e-2, x = 3, 0.6e-2, x = 4, (-1)*0.6e-2, x = 5, 0.4e-2, x = 6, 0.1e-2, x = 7, 0.1e-2, x = 8, 0, x = 9, 0.4e-2, x = 10, 0.8e-2, x = 11, 0.6e-2, x = 12, 0.17e-1, x = 13, 0.2e-2, x = 14, 0.13e-1, x = 15, 0.12e-1, x = 16, 0.6e-2, x = 17, 0.1e-2, x = 18, 0.2e-2, x = 19, 0.1e-2, x = 20, 0.12e-1, x = 21, (-1...