I solve system of ordinary differential equations numerically by method=rkf45 (Runge-Kutta Fehlberg method).

1. Maple 13 installed on the Linux x64. Processor – AMD Phenom (4 cores). When Maple computes it uses only one core but other three cores stand idle. How to impel to compute other cores?
2. When I solve system of ODE a calculation reaches closely 1 ns and stops. Maple writes that value of Maxfun exceeded. But I need solve system up to 10 μs....

Hi! I've tried to figure out what to do with plot([sin^2(x),line(x)],x=-2*pi..2*pi,y=-.1..1.1,tickmarks=[spacing(pi),default});

Warning, unable to evaluate 1 of the 2 functions to numeric values in the region; see the plotting command's help page to ensure the calling sequence is correct.

original problem is f(x)=sin^2(x). I had to plot with the tangent line.

I played aorund a bit with the "Insert Table" command and it seems to create just an inert object that cannot be accessed or operated upon except directly by typing into its boxes. Is that true? Is it just for word processing?

Hello

i want to solve this equation

but i couldn't

please help me

( x mod 5656 = 565 ; x mod 565 = 56)

Why the command

does not return eps???

How can I simplify expressions like this?

I am new to this, so should be simple.

i define a function p

> p := proc (x) options operator, arrow; 10*x-20*piecewise(x < 2, 0, 2 <= x, x-2) end proc;

sendtomap1.mw, sendtomap2.mw, wood_riess.zipHi! I've written a program for my work to obtain "chi square" for a range of data. Can someone tell me why my first example which I have attached and I've called it "sendtomap1" works correctly, but the second one "sendtomap2" has an error?...

why won't VectorCalculus[Jacobian] accept vectors?

... to prevent me from frying my system? or is it an unnecessary restriction?

Here's what I mean:

Fvec := Vector([x[1]*x[2],3*x[3]]);
Xvec := Vector([x[1],x[2]]);
Flst := [x[1]*x[2],3*x[3]];
Xlst := [x[1],x[2]];
VectorCalculus[Jacobian](Fvec,Xlst);
VectorCalculus[Jacobian](Flst,Xlst);
VectorCalculus[Jacobian](Flst,Xvec);

Error, invalid input: too many and/or wrong type...

I want to plot a graph for the two variable function

over the region x = [-2,2] and y = [-2,2].

How I can create a coloured [or with different shades of grey to see the difference in a black and white printout] "contour" plot of this function over the same reagion? Using 8 contours and in such a way that it is illustrative...

I have the space curve with parametric equations x = t ,  y = 0.5t² , and z = t²

I need to find the unit tangent vector, unit normal vector and the binormal vector  at t=1

I also need to find the curvature at t=1

How I can calculate that step by step that in maple and also plot the space curve and the curvature graph seperat in maple?

How I can find parametric equations for the line of intersection of the planes 3x - 5y + z = -7 and x + 8y - 4z = 13

in maple with a step by step approach?

and also plot a graph in maple showing the two planes and the line of intersection?

please i want to write the maple programme  for solving y^/ =y, y(0)=1, 0≤x≤1 with h=0.1 using the following three schemes simultaneously:

1. (7/12)y_n+1 - y_n+1/2 +5/12y_n =(h/12)f_n+2

2. y_n+2 - (4/3)y_n+1 +1/3y_n =(2h/3)f_n+2

3. y_n+1 -y_n =hf_n+1/2

How do you enter h in a Euler's method problem? I need to change h=0.1 to h=0.05

I'm using the 2D input in Maple 14.

So far I have this:

> DE2 := diff(y(t), t) = 3+t-y(t);

> Euler(DE2, y(0) = 1, t = .4);

> Euler(DE2, y(0) = 1, t = .4, output = Error);

> Euler(DE2, y(0) = 1, t = .4, output = information);

When I learning "Maple introductory programming guide", there is a little procedure attracting me:

_________________________________

NewName := proc ()

    global N;

    N := N+1;

    while assigned(cat(C, N)) do

        N := N+1;

    end do;

    cat(C, N);

end proc

_________________________________

Dear primers,

I have a curve that shows 4 maxima (green curve in the image, red curve is the derivative). Now i simply want the coordinates of these maxima without defining a threshold. I tried the "ExtremePoints" function, but it returns an error ("...cannot determine discontinuities") and the "extrema" function which gives me only one max and min value.It would be great, if somebody could give me a hint...