Hi friends,

I have this piecewise function:

restart:assume(n,integer):h := piecewise(n::odd, n^2, n^3);

I can not get explicitly the derivative:

diff(h,n);

But, with

restart:h1 := piecewise(And(n::integer, n::odd), n^2, n^3);

I can get the derivative explicitly:

diff(h1,n);

Why ?

Thanks in advance

k := 1:
alpha := vector([x*cos(theta), x*sin(theta), k*x]);

e1 := map(diff, alpha, theta);
e2 := map(diff, alpha, x);

G := matrix([[simplify(e1[1]^2 + e1[2]^2 + e1[3]^2), 0],[0, simplify(e2[1]^2 + e2[2]^2 + e2[3]^2)]]);

inv_e1 := evalm(1/G[1,1]*e1);
inv_e2 := evalm(1/G[2,2]*e2);

e11 := map(diff, e1, theta);
e12 := map(diff, e1, x);
e22 := map(diff, e2, x);

gamma_1_11 := simplify(evalm(e11&*inv_e1));
gamma_1_12 := simplify(evalm(e12&*inv_e1));

How to interpolate in terms of any form of algebra in maple?

For example, to interpolate a time series in terms of exponential or mixed with cos and sin?

Hi, all,

Is there a command to test whether two polynomials are equal to each other?

Or I have to write a procedure to do that?

Thanks.

Gepo

I guess I have an easy question here. How do you write stuff in Maple which you don't want displayed? For example, if I wanted to set alpha=1 but I didn't want that printed after pressing enter?

Cheers

Hi all forum people, I need use the maple for symbolic solutions, I am a beginner user.

I read about the isolate, solve, equations, expressions and functions in maple, I have a great confusion in my head.

My needs are, make a equations (with currents and voltages) and isolate any variable in a time, and combine them with another equations.

  ic=vin/L*Ton+im

if=(vin-vo)/L*Toff+im

dil/dt=(if-im)/T

another case:

Hello friends,

I am using MAPLE 14. I have the following problems. I would like to plot the sequence of points "ww", and the constant funcion  (ordenate) 1/3.  The plot of my commands is ok in terms of the "spirit" of the output, but I would like

1. That in the abscisa appears values larger than 10..say  50.

2. The (horizontal)  line of the constant funcion 1/3 = function of (n)  is thinner (in the current output, this line is too thick).

I tried the following (simplified) for loop

q[1,0]:=x->x^2;
for i from 1 to 2 do
q[1,i]:= 2* diff(q[1,i-1](x),x);
od;

something seems to be wrong when trying to assing the new functions:

q[1,1](x);

just gives "Error, (in q[1, 2]) too many levels of recursion"

What am i doing wrong here?

Maple cannot find maximum/extrema for this piecewise function?

http://img97.imageshack.us/img97/3931/mapleerror.gif

Find all the solutions of the equation y*diff(u(x,y),x)-sin(x)*diff(u(x,y),y)=u(x,y)^2 in a neighborgood of the origin (0,0).

Hi guys,

I've a bad 6x6 matrix, which contains both very big (10^14) and very small (~10) numbers, so that the inversion with digits=15 is pretty bad (if I multiply the inverse by the original one I've offdiagonal elements of the order of 10^6!!!).

I was trying to calculate the Eigenvalues, but something strange happens. With Digits=15

Eigenvalues=  Vector(6, {(1) = -0.2101e-1, (2) = .83693, (3) = 114.86139, (4) = 19791.80546, (5) = 134594000.00000, (6) = 624049000000000.})

This is an exercise in my text book. The question is to plot the root locus of a system. The open-loop transfer function of the system is G(s).

I use maple command 'rootlocus()' to plot the root locus, but the result is not correct apparently. This make me very puzzling, now that maple use fsolve command to compute the roots as the help document...

I have this question to answer but I have no clue whatsoever what to do. I'm a first year student so this Maple stuff is all pretty much new to me. Can't seem to figure out what "det" is. 

For the matrices A = Matrix([[2,-1,1],[3,1,-1],[0,2,2]]) and B =  Matrix([[2,1,5],[4,3,8],[0,-1,0]]) verify that det(A . B) = det(A) det(B)

How do I do this?

Dear All,

could anyone of you provide me with some guidance on how to tackle my issue,i.e. unable to launch Maple 14 on Mac OS 10.5.8,please? Its icon bounces off and that's that.

Hi all,

I have a large system of equations in matrix form A x = b (A and b are constituated with numbers)

The rank of the matrice A is 1524 by 1524

How to solve numerically the system with maple. I searched in maple help and mapleprimes questions but I have not got answer.

If maple has a limitation in solving large system of equation numerically,

Is it possible to export the matrices A and b in matlab and solve the system in matlab and...