Does there exist a way in Maple that you can detect a change in a text file without having
to constantly having to call the readdata which keep the command prompt busy in Maple.
For example if you have a txt file that is constantly updating it self with new data
I want the matrix in Maple to be updated dynamically by adding the new data.
Is this possible ?

I am trying to code a naive method for checking if a number is prime. where it checks if a number is prime by checking if a number 'k' divdes into n.

 

Hello, i have attached the file here.

Basically i have an eighth order equation in m. This will produce eight solutions of m. Then i need to substitute each solution of m into a matrix, say M. Thus generating a matrix for each m value. Can someone show me how to do this please...

Greetings Is there a nice way to obtain the jacobian of a system of ODEs ? For example with restart: ross_x:=diff(x(t),t)=-y(t)-z(t): ross_y:=diff(y(t),t)=x(t)+a*y(t): ross_z:=diff(z(t),t)=b+x(t)*z(t)-c*z(t): rossler_sys:=ross_x,ross_y,ross_z; I can't seem to find an easy way to do it, other than re-write the system altogether s_x:=-y-z: s_y:=x + a*y: s_z:=b+z*(x-c): J:=Matrix([[diff(s_x,x),diff(s_x,y),diff(s_x,z)],[diff(s_y,x),diff(s_y,y),diff(s_y,z)],[diff(s_z,x),diff(s_z,y),diff(s_z,z)]]); .....which seems horrible. Thanks LR

Hello! Why does Maple not compute the following residue? residue(((x^7+1)^4/x^30), x=0); Maybe the powers are too high? Are there any parameters I can set so that Maple produces a result? Thanks! Marco

How can I tell Maple to read all txt files in a specified folder ?
The names of each txt files are different ( I dont know the names )

Using maple help: wiht(plots): animate(plot, [Ax^2, x = -4 .. 4], A = -3 .. 3, trace = 5, frames = 50) the above command shows a plot with no animation... What's wrong?

*sigh* Mathematica,

 

how do I plot the bifurcation diagram with Maple of the function:

 

dx/dt = rx - sin(x) ?

My goal: given G(z,w), find the polynomial, P(n), in the partial derivatives of G(z,w) over the integer such that 

d^n z/ dw^n = P(n) / Gz^(2n-1)    where Gz= partial derivative of G with respect to z.

Step 1. Differentiate G(z(w),w) w.r.t w n times. Formulae are known for doing that (Mishkov, Tsoy-Wo Ma),

I came across this issue on my course today, and found it somewhat surprising: restart:Digits:=7: foo:=1/2*sqrt(3): evalf(foo); 0.8660255 evalf[5](%); 0.86603 evalf[5](foo); 0.86605 I suppose this means that whatever algorithm Maple uses to compute the square root also works to the specified level of accuracy and the above is a result of accumulated rounding errors.

question1:

with(Optimization)

Minimize((1-b^2)/a+(1-c^2)/b+(1-a^2)/c, {a^2+b^2+c^2 = 1}, assume = nonnegative)

the result is strange:

[3.46410161513774462, [a = .577350269189626620, b = .577350269189626620, c = .577350269189626620]]

make the datatype not the float form in the results. 3.4641... to 2 sqrt(3)

question2:how to do this.I use sqrt(1-a^2-b^2) to substitute for c.

Minimize((1-b^2)/a+(1-a^2)/sqrt(1-a^2-b^2)+(a^2+b^2)/b, assume = nonnegative)

question3:

Hello, everyone! I would like to find a the unique, reduced grobner basis of a particular ideal. I know that gsolve in the old with(grobner) package would return this, but I can't decipher the documentation of the new with(Groebner) package to figure out how to do it.

If I have a list of polynomials and a given monomial order, I know that I can call:

with(Groebner);

my_gb := Basis(my_I, my_ord)

Hello!

I am solving numerically a non-linear Pde using the command  "pds:=pdsolve(....)"  and all are as they should be...[ pds := module ()...] but when i am trying to plot the outcome i receive: "Error, (in pdsolve/numeric/xprofile) unable to compute solution for t>.188000000000000000:Newton iteration is not converging "

Is there a way to overcome this problem (even if i must lose in accuracy..)???

Thanks!

 

My comp (AMD Athlon 64 Processor 3000+, 1.5 GB RAM) calculates the integral int(1/(x^4+3*x^2+1)^p,x=0..infinity) for p<=545 and the same comp with Maple 10 calculated this integral for p=3000. The answer is of the form k/n*Pi*sqrt(5), where k and m are natural numbers.

How to explain that?

Anyone know how to debug FOR loops in MAPLE? Thanks in advance.

Luciane.