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Hi.

I want to solve two varibles from a vector crossproduct equation, but receives a failure massage no matter what i do.
The equation is the one below and i want to solve for Gx and Gy.

Really hope you can help.. THANKS!

with(LinearAlgebra);
F1:=<Fr1,-Ft1,-Fa1>;
Sug :=<0,0,-Duzg>;
Su1:=<Dux1,0,-Duz1>;
Mmotor:=<0,0,-Mind>;
G:=<Gx,Gy,Gz>;
OO:=<0,0,0>;

U:=(Su1 &x F1) + (Sug &x G) - Mmotor = OO;...

Hi all,

I am new to Maple and I have (possibly a simple) question. I'm solving 2 coupled differential equation, it all goes well, until I want to plot them.

I have the output in the following form:

sol = {w1(x) = [ -a*x^4+b*x^3-c*x]}, {w2(x) = [-d*x^4+e*x^3-f*x^2+gx-h]}

My goal is now to plot the solution in 1 figure with w1(x) between x=0..100000 and w2(x) between x=100000..150000

I have searched on the web for a way to get the formula's of w1(x...

Hello

I am trying to find the maximum of values in dsolve. In part 1 we solve the equation. In part 2 we do a doolop to know the values for specific time such as t=2. In part 3 we try to give this values names such as y[i] then to find the maximum of these values but it did not work for the maximum it gave y6 instead of the value.

 

Also, is it possible to save all values from dsolve  to a file the call it to find the maximum at each t?

Hi!

I need to assign a name to a result calculated from a system of equations. In this case, i've got 2 equations and 2 solutions. I want to assign a name to the each of the solutions.

solve({-a+4*b = 0, 2*a+7*b = 2}, {a, b})

{a = 8/15, b = 2/15}

How do i assign a name for a and another for b?

rearring equations...

March 06 2013 woofwoof 15

Hi I know this is a simple question but i have completely forgotten how to do it: I have the following equation, 

h := ((A-B)^2*(A-4-B^2+4*B)*(A-4-B^2-4*B)-Q^2*(A-4-B^2+4*B))/(Q^2*(A-4-B^2-4*B))-1

how can I find what B is equal to?

hello friends am working on 2d heat equation and i have writen maple code for it but its not running because my scheme is having fictitious points which are removed by using boundary conditions but in this code which i have written the line in bold is not using boundary conditions due to which my fictitious points are still in programe and its not working am attaching my worksheet

trytimg.mw

please let me know where am wrong thank you...

Hi all,

I have a differential equation as follows:

x(t)^2+cos(x(t))+diff(x(t), t)+diff(x(t), t, t) = 100

x(0)=2, D(x)(0) = 3;

After using "dsolve" to solve this equation, the solution x(t) is obtained.

How can we obtain the following function?

g(k) = 0kx2(t)dt

How can we plot the function g(k...

Hi all,

First of all, I would like to mention that I'm new to Maple, so please excuse my lack of knowledge.

I have a rather complicated expression, let us call it expr, and I have a constraint equation, let us call it constr = 0. I would like to simplify expr knowing that constr = 0.

Stupid example:

expr: 2*x+4*y+3

constr: x+2*y = 0

In that case:

expr = 2*(x+2*y)+3 = 2*0+3 = 3

How can I do that?

Thanks a lot.

How can I use factor in equations?

For example:

x^6+y*x^4+z*x^2-g*x^4-3*x^6====>-2*x^6+(y-g)*x^4+z*x^2

or

a*cn+w*dn+e*cn+f*dn=====>(a+e)*cn+(w+f)*dn

These examples are very simple.

Thank you

Hi all,


I must confess I'm a perfect novice in Maple as I'm used to work with Matlab. I have a 3d differential equation, namely:


dM/dt+gamma*mu[0]*`&x`(M, H[eff])-G/(gamma*M^2) *`&x`(M, dM/dt)= 0

The components of M should be of the form M_{i0} + dM_i(t) where M_{i0} is a constant and dM_i(t) a function of t, i = 1, 2, 3. And...

Hello,

I would be grateful if other users of Maple TA could post their experiences of the Equation Editor here.  I have used it in Maple TA 5 (on premise) and 8 (hosted) and in both cases it is incredibly slow to load, has errors with out of date certificates (I've been told these will be fixed in version 9), and sometimes just won't display an equation from the question at all.  I don't think I'm doing anything wrong (I position my cursor on the equation...

Hi,

I am aplying a simple energie balance with some simplification, and i am implementing it on maplesim.

The component has the following equations:

Am i missing something? Do i need any aditional equation to maplesim know to where should the fluid be moving when Qjacto is positive or negative? Why do i have...

http://en.wikipedia.org/wiki/Laguerre_polynomials

http://wenku.baidu.com/view/7d013c8c680203d8ce2f24ee.html  

how to evaluate to equation (5.9) in page 195 from rodrigues formula?

rodrigues := exp(x)*(x^alpha)/n!*Diff(exp(-x)*(x^(n+alpha)), x$n);
rodrigues := subs(x=2*p, rodrigues);
rodrigues := subs(alpha=1/2, rodrigues);

Dear Friends.   I solve a group of linear equations and the memory is not enough and i can't 
adding a new hardware to the computer.

i increase the virtual memory of the computer from some chose for the operating system 
but it seem to me the Maple use the memory from the hardware only.

I want to know is there any method to make the Maple using the virtual memory for 
the computer

Amr
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