Dear All,

I am trying to solve the following equation in Maple but could not find the actual result:

P:=1/2 * Real (E x H*)

How to find the real value of (E x H) with H*= H conjugate.   And also which command to solve for the value P.

Your help will really be appreciated

Thanks in advance

A.Q

Soton

HI,

I've got a MapleCode with exports the data in the end into an ".txt"-File. Now it's necessary to create an"Tab" instead of the semicolon, which is produced now between A and B.

Now: "A;B"

Should be: "A    B" (Tab between).

> fd := fopen("C:/ZZZ_TEST4.txt", WRITE);
                      ...

I wrote a program in order to find coordinates orthocenter of the triangle. Please comment for me. This is my code:

restart;

with(geom3d);

point(A,1,-3,0);

point(B,-2,1,1);

point(C,3,1,2);

line(AB,[A,B],t);

line(BC,[B,C],t);

ab:=ParallelVector(AB); 

bc:=ParallelVector(BC);

eq1:=Equation(plane(P,[C,ab],[x,y,z]));

eq2:=Equation(plane(Q,[A,bc],[x,y,z]));

eq3:=Equation(plane(ABC,[A,B,C],[x,y,z]));

How can I replace/substitute a combination of variables with a new variable?

For example, if ...

h:=(1+i)^2+(1+i)^3*A+(1+i)^4*B

I want to assign the value g:=1+i

so that h returns g^2+g^3*A+g^4*B

Do I have to change the 1+i to a name? or can it be done as it is?

I am learning about programming; I have this equation:

2*K2*alpha*t=ln[(A0+E(beta-1/2)/(A0-E(beta+1/2)

The values of t, E are a list of values.

and K2 alpha and beta are unknown but i dont know how to do for graph the part of ln vs time and fit it to a line.

For next list of variables 

RVars:=[[''Rla'',''Rlb'',''Rsa'',''Rsb'',''RN''], [''GAL'',''GBL'',''GAS'',''GBS'',''GN'']];

(no double qoutes, 2 single quotes, of course)

want all of them to be redefinable with suffix option i.e. both of operators below

assign(m || (RVars[1,1]), 5);

assign( RVars[1,1], 5);

should be reentered without restart as many as wish. With 2nd form everything...

can you explain me when i solve equation beta-t*beta=0 with condition beta<>0. I write command:
r :=solve(beta-t*beta, t, UseAssumptions), assuming beta <> 0
It works well. But it will be a problem when command is:
r :=solve(beta-t*beta, t, UseAssumptions), assuming beta <> 0, gamma<>0;
Error: Error, (in assuming) when calling 'assume'. Received: 'cannot assume on a constant object'.
thank you very much.

Hello,

I need to verify some terms in an equation which would involve the application of chain rule. I have A:=f(x,y), x:=g(t,s) and y:=h(t,s). Now I want to find the terms that will be present in the expression after application of Chain rule for the term d^4(A)/dt^4. The exact definition of A is not know. It is just known that it is function of x & y. I just need the expression for d^4(A)/dt^4 in terms of dA/dt*dt/dx and so on. Could anyone please suggest a way of doing this in Maple?

Hi there. 

I'm making some 2D contour plots and am desperate to know what the values are which are assigned to the different contour levels. e.g., a red band must be reading value 120 (say) and an orange one 80, but how can I get this and show it on a legend in the plot? It's crucial to the value of the plot. 

Many thanks for any help!

David

Hello,

I'm trying to solve the following system in Maple but it doesn't show me any solution:

where x(0)=0 and y2(0)=0 , k>0,...

How to play the Maple worksheet Alkylation Process Model Using DirectSearch

(http://www.maplesoft.com/applications/view.aspx?SID=1675)

There is some equivalence between GlobalOptimization commands: GetLastSolution and GlovalSolve and DirectSearch commands?

Gracias

Dear all

I made an array as

> T := Array(1..x, 1..6);

 where x = 1,000,000:

and then I wrote a loop for and after that I wanted to write the results as

> writedata("D:\\data\\test.txt", convert(T,array), float);

but I got an error as

> Error(in convert/list) object too large

What should I do now? It took more than 24 hours to run my program and I need the results as a text file. Please help me.

Hi all, Im trying to differentiate this function using maple, but Im not sure how (see image below). Any help will be most appreciated. Cheers.
http://img685.imageshack.us/img685/4503/maplediff.jpg

I'm working on a simple toy model as an introductory example to some work I am writing up. I was hoping the example would be simple enough to get some nice analytical results to write up. However, maple is giving me some odd results.

Essentially I have taken the integral of the absolute value of an error that I have caluclated which has given me a somewhat nonsensical result. The attached file contains the specifics (hopefuly it's visible)...

What indets should be to return from next form b only:

Distribution(PDF = (x->Dirac(x-b)))

indets(Distribution(PDF = (x->Dirac(x-b))),name); wrong