dsys := {1/2*diff(theta(t),`$`(t,2))*cos(phi(t))+5/4*diff(theta(t),`$`(t,2))+5/4*diff(phi(t),`$`(t,2))+1/2*sin(phi(t))*diff(theta(t),t)^2, -1/2*mu(t)*sin(phi(t))*diff(theta(t),`$`(t,2))-diff(phi(t),`$`(t,2))+1/2*mu(t)*cos(phi(t))*diff(theta(t),t)^2+5/4*diff(mu(t),`$`(t,2))-150000000000/(1+exp(27.0-15*sin(theta(t))-15*sin(theta(t)+phi(t))))^2*cos(theta(t)+phi(t))*exp(27.0-15*sin(theta(t))-15*sin(theta(t)+phi(t))), (-1-mu(t)*sin(phi(t)))*diff(theta(t),`$`(t,2))-1/2*mu(t...

Hello,

I am new to Maple and I am interested to know what programming language Maple is written in - I mean the maths part of Maple of course and not the interface which appears to be in Java.

Thanks in advance,

Julien.

What is the Problem? Do not use SingularValues (A, output = ['list'])?
Some care in handling this command?

Hello,

I am tying to compute the wronskian of a set of functions. I loaded the LinearAlgebra package and still Maple won't recognize the following command:

wronskian(x, x^2, x^3)

Can anyone please help?

Thanks in advance,

Julien.

Hello,

I am new to Maple and would like to know how to recall the last expression in maple. Say I write "x^2 +2", then press enter and I then want to recall "x^2 +2" without retyping it. How do I do that? (I think I am in math mode using "xmaple".)

Thanks in advance,

Julien.

When integrating 1/x as int(1/x,x) the answer is ln(x) while it should be ln(abs(x)). How does one fixes this mistake?

@epostma Thank you , that really worked. My next question is, if the raw data is in a text file, other than data pasted into excel, how can i import the the two columns of data and do the similar calculation?

The text file is attached.

[0, 0, 0]
Voltage_1 (1) Current_1 (1)
+2.084844E-03 -1.539501E-11
+1.008272E+00 +7.418045E-11

Consider the following expression:

sCARA4 := -ln(-(mu/sigma^2)^(mu^2/(mu-sigma^2))*(sigma^2/mu)^(mu^2/(mu-sigma^2))+(sigma^2/mu)^(mu^2/(mu-sigma^2))*((exp(phi)*sigma^2+mu-sigma^2)*exp(-phi)/sigma^2)^(mu^2/(mu-sigma^2))+1)/phi;

Now try to find out whether the first derivative to mu is positive for all positive mu, phi and sigma, except for some rare exceptions (e.g. sigma^2=mu).

diff(%,mu);

Since 'is' is not a satisfying option, I used 'Explore'...

hi

please help me to solve this error.

Error.pdf 

Hello,

I have Tetrahedron and I know all it's points I need to compute it's volume.

I have computed the square of the triangle and all I need is the hight.

Please give me an answer including vectors.

Thanks a lot.

Hey everyone.  I'm having problems solving a set of complicated PDEs.  I found a question before that helped me a bit, but the answer was less than ideal.

Here is what I have so far.

pde := [-1/4*Gamma*(Gamma-2)/r^2*G(v,r)+1/r^3*j[v](v,r)*Gamma-1/r*diff(h[vv](v,r),r)-1/r^2*h[vv](v,r)+1/2*1/r^2*diff(j[v](v,r),r)*Gamma = 0, 1/4*f(r)*Gamma*(Gamma-2)*G(v,r)/r^2+1/r*f(r)*diff(h[vv](v,r),r)+1/r*diff(h[vv](v,r),v)-1/r^2*f(r)*diff(j[v](v,r),r)*Gamma-1/r^2*diff(j[v...

maple_error.doc

Hello,

I have a plane x+2*y+3*z = 0 and a point A(1,2,3).

From A there are 3 lines :

P := (1, 2, 3) P1 := (-1, -1, 0) L1 := P+t*(P1-P)

How to find the cutting points between L1 and the above plane?

How to find a cutting points between planes? 2 3 4 planes etc.

It is urgent, please help me!

How do you map b into a to get [[a1,a2,b1],[a3,a4,b2],[a5,a6,b3]]

a:=[[a1,a2],[a3,a4],[a5,a6]]
b:=[b1,b2,b3]

Hello Colleagues:
I have tried to develop in Maple as shown in the following Gif.

What I've achieved is these few lines of commands: