Hey,

I am trying to solve a polynomial function for which there should be two solutions for x (it is just a standard x^2 +ax +a type equation, but I am a complete newb to maple and can only seem to get one solution for x.  Can you please tell me exactly what I need to enter to get all solutions for x.

 

Thanks

Hey,

I am trying to make a 3D plot of the following, but when I enter it, I am only getting the option to do a 2D Implicit plot for some reason.  Can you please tell me exactly what I need to enter, so I can make a 3D plot?

G(x, y) = e^(sinx) * cos(y)sin(xy)

Thanks...

I have a differential equations system with initial condition which contains complex numbers, but there is an error which says "dsolve/numeric can not solve with complex number the system must be converted to real system".

What should I do? how do I solve a differential equations system with complex initial values with maple?

Thanks....

<p>Good Morning Everybody,</p>
<p>I'm wondering what is wrong with the Maple code below, the worksheet works but Maple could not read L[1], L[2], L[3], and L[4] from the list param to give numerical solution. Would anyone be kind to tell me what is wrong with the code.</p>
<p>Regards,</p>
<p>restart:</p>
<p>n :=4</p>
<p> > n := 4;<br />
print(??); # input placeholder</p>

I am trying to build a portfolio optimization model from simulated data. I start by defining the very large

correlation matrix and then I apply Cholesky decomp to get the cross correlated simulated data. However

I systematically get the warning message:  Warning, Matrix is not positive-definite. It is extremely difficult

(if possible at all) to specify a large correlation matrix that is positive-definite.

 

Hi all,

I need to obtain the partial derivative of the following functional, with respect to "a" and "b":

for example, diff(p(a(t),b(t)), a) or diff(p(a(t),b(t)), b)

I am using Maple 12, but it returns 0 while using the above command. Does anybody know how to enter the correct commands?

Thank you in advance,

Saeid

 

Hello all,

 

I've been trying to recreate a simulation from a textbook, and the system of equations needs starting values to solve correctly. I've supplied all of the information that another program uses, and the degrees of freedom make sense, and I can even solve it with fsolve. However, as I try to supply the starting_values to the fsolve, I get the error "fsolve cannot solve on starting_values(...". Any help appreciated. I'm attaching the file...

 

Thanks in advance,

 

Fred

 

I am trying to learn to love Maple's document mode... I would like to be able to display a matrix formula or equation without evaluating it. One way to do this is with the following commands:

  with(LinearAlgebra): `print/&.` := proc (l, r) l.r end proc
  pq := <<-P^2, -P*Q+c>|< P*Q+c, Q^2>>
  2*<g.P, g.Q> = pq &. <alpha, beta>

(Paste them into a worksheet in document mode and press Enter to execute one at a time.)

Hello, the equation I have is of the 4th order and rather long. If i assign values to four of the five parameters then maple gives me four numerical solutions. however if i try to solve analytically with at least two or more parameters then maple cannot find the roots.

is there a way around this?

thank you

 

Is it possible to type special characters such as Newton notation for derivatives i.e. x with one or more dots above it - or X with a bar above it to signify 'mean' in statistics etc. I want to be able to use these to print text-book quality documents. Are these characters available as maths input?

Hi, I solved a differential equation which is: ode := diff(y(x), x) = 2*(e1*m_b*sqrt(y(x))+m_b*psi+m_b*c1*(R0^2-y(x))); dsolve(ode); but the answer that I got is: x-Intat(1/(2*m_b*(e1*sqrt(_a)+psi+c1*R0^2-c1*_a)), _a = y(x))+_C1 = 0 How can I interpret this answer? Thank you,

Good Day Everyone,

My first question is with regards to sequence function in Maple. I have input into Maple the following

xp := map(z->z*[ft], [0.0, 3.3, 3.3, 0.0])

yp := map(z->z*[ft], [0.0, 0.0, -3.3, -3.3])

npile := nops(xp)

d := [seq(sqrt((xp[i] - xp[i + 1])^2 + (yp[i] - yp[i + 1])^2), i = 1..npile)]

I was getting an error message from Maple, "Error, invalid subscript selector", what have I done wrong in Maple?

 

V:=Vector([[0],[0.0003060109290],[0.0003327659830],[0.0003351052226],[0.0003353097460],[0.0003353276280],[0.0003353291916],[0.0003353293282]]);

 

I have this vector that shows my results converge. Is there any way to plot this that shows a curve that my results converge, I plotted using different ways but it still looks like a line not a curve

 

Can anyone give me a good example of MultiThreading in Maple  with(Threads):

I looked in the help files but I could not find anything good. The example should include a loop

which is running in the background while the user is doing other things simultaneously in Maple.

 

The loops could be using a time delay to slow it down

st := time[real](); while time[real]()-st < 5 do  end do ;

The output from each iteration should be displayed in a math container so we can see that it is working.

I wish to know if there is a maple command to extract the coefficient of a specific monomial in a polynomial. For example, if we have a polynomial f(x,y,z), how can we extract the coefficient of the monomial x^2yz^3 in f with a maple command?

Thank you in advance.