how to rewritten the PDEs to the matrix form like the following in Maple

Thank you for suggestions. The system in matrix form looks like z(k+1)=Az(k). The solution to that is z(k)=A^kz(0). Now, phase planes of the system would look different for different matrix A (specifically, eigenvalues of A). For example, for complex eigenvalues phase plane would look like a spiral. I'm having difficulties plotting those phase planes. It's easy for differential equation, but I'm not sure how to work with system of difference equation in Maple.

I have attempted making a translation the Wolfram Mathematic's document: Singular Value Decomposition.
I present Problems in showing the arches of angles. Besides result do not correspond .

Plot_singular_value_.mw

Gracias

Hi,

with(OrthogonalExpansions) not working in Maple 15 (work in Maple 14). What is the equivalent package for FourierSeries calculations?

Thanks in advance

Kamel Boughrara

 I have the following equation that I want to plot for theta and t with other parameter values in the equation fixed as below. But when I try to animate the solution I get an 'unable to plot' error message. What can I do to plot the equation, U(theta, t) below.

 U(theta, t) := 1/2/Pi+Q*sin(k*theta)+P*sin(m*theta)+1/4*(-I*Q*exp(1/2*k*(-sigma^2*k+2*I*theta...

Hello,

does anybody have any idea how to simplify

> t:=5^(-n)*2^n;

to 

> s:=(2/5)^n;

Pavel

I have Maple 15. I am trying to calculate the limit of this function

((x^3-2x^2+sin(x))^(1/3))/(6x+2)

for x tend to +infinity. As you can get it with a rapid manual calculus, this limit is 1/6. But Maple returns undefined for this very simple limit. Why? How can i get Maple to calculate limits correctly? Derive 6 return the correct answer 

Hi,

How can i delete a row in a (2D) Matrix?

Thanks,   (Mohsen)

evolf := proc(f);
h1 := z + f(x);
h2 := z - f(x);
h3 := z*f(x);
h4 := f(x)/z;
h5 := z+diff(f(x),x);
h6 := z-diff(f(x),x);
h7 := z*diff(f(x),x);
h8 := diff(f(x),x)/z;
h9 := subs(x=z, f(x));
test := [h1, h2, h3, h4, h5, h6, h7, h8, h9];
F = 0;
for i from 1 to 9 do
    F = F + 1/(1+exp(subs(x=0,test[i])-subs(x=0,f(x))));
end proc;            

Hi there,

I am using plot3d in worksheet mode to create a bunge of complex 3d-geometries containing "patches" (style = wireframeopaque) and wireframes (style = wireframe) representing the deformed and undeformed geometry of a system. I would like to export them as vector graphics since only then the results look nice enough to be used in a report.

When using Maple 12 rightclick->export->EPS, works nearly. Unfortunately the patches are not really...

I have tried everything I can think of but cannot figure out how to phase a sine wave so that I see 3 plots of

f(x)=sin(x)

as a set of {0°, 120°, 240°} together on the same plot...

Hi there,

I have a system of seven equations and want to make a phase plane with field arrows for two independent variables (C vs I). When I use DEplot it doesn't give me field with arrows. I just wonder if anybody could please help me in this issue. Here is my system:

dp/dt = P kappa I-gamma[1] CE- delta[1] CH

dE/dt = lambda E(E[0]-E)-gamma[1] C E

dI/dt = gamma[1] CE + eta Ia/(epsilon+K) -kappa I -alpha K I-delta[2] I M

dIa/dt = alpha K I+delta[2] I M

I have a model which contains 3 variables and several parameters, the equtions are as following:

diff(i(t),t) = alpha*B(t)*S(t)/(K+B(t))-r*i(t)
diff(S(t),t) = -alpha*B(t)*S(t)/(K+B(t))+b*(N-S(t))
diff(B(t),t) = e*i(t)+g*B(t)

How can I solve them to get the solutions by using Maple, and plot them?

Sorry I'm just a new learner with little math background. Plz explain more specific if you want. Thanks for your help.

I just wondered if there was a similar rule for sine.

I have the system of two difference equations. I need to plot phase plane of (x(k), y(k)).