Hi

I have been using the pdesolve command to solve the heat conduction equation in an infinitely long cylinder, but now I need to incorporate the convection that occurs at the end surfaces, in the case of a short cylinder.

The following is the code I have been using:

>> PDE := diff(Theta(r, t), r, r)+(diff(Theta(r, t), r))/r = (diff(Theta(r, t), t))/alpha;

>> pdsolve(PDE);

I have tried to add...

Hi

The problem is, as said, how can i get a "math output" when having something typed into my package.. 

An example of this could be:

printf("\Your function is: x^2");

When typing it like this my output becomes x^2, I would like it to become x² , how can I fix this?

- Slangers

how can i draw a polygon with labeled vertex by numbers which are inside of that polygon§

I have Maple 15.

I used one of the "Assistants" to solve a problem.

It offered me the command line code that would have solved the problem without the Assistant.

I saved that code to a file, and later tried to paste it into a new Worksheet.

It won't execute.  I can't convert it to anything that executes.

I assume Maple is viewing it as text, and not something that is executable.

sol1 := dsolve([diff(x(t),t) = y(t), diff(y(t),t) = -x(t), x(0) = 0, y(0) = 1...

L include kinetic energy

when F = diff( diff( L, dx), t) - diff(L,x)

i need to diff L with respect to dx, however, there is no dx in maple, how to do above equations?

with(DifferentialGeometry):
DGsetup([x],M):
ExteriorDerivative(x^2);

invalid frame: DGframe_data[0][1][2]

how to diff x^2 to get 2*x*dx with above command?

How come that I don't have a Maple Questioner Badge? 2886 people question Maple and I trust it unquestionably?

Even adiban who didn't post anything on this site, has it (as well as 10 other badges and a reputation of 1000).

I have a Pupil badge, which I couldn't get without asking a question - so I've asked at least 1 question.

Let's see if I get it after asking this question.

Alec

1.at parse(sprintf("%.3f",subs(x=1, pdf))); it error said number expected for floating point format

i need to copy the whole formula to pdf := something then it can calculate

2. also it can not plot

%%%% copyright by Martin Lee 2011%%%%%%%

l := [12, 14, 27, 35, 46, 49];
sl := gfun[listtoseries](l, x, egf);
g := convert(sl, ratpoly);
g := g - subs(x=0, g);
g := g/subs(x=1, g);
parse(sprintf("%.3f",subs(x=1, g)));
parse(sprintf("%.3f",subs(x=0.9, g)));

How to reserve dx when diff a formula

when i diff x^2 , need to be 2*x*dx but it only 2*x

How to reserve dx?

How do I create a symbolic sequence with a variable number of elements, so that later I can come back and set the number of elements to an integer? Maple has inert forms for many functions (e.g. Sum and sum), but there does not appear to be anything like "Seq" which would be the inert analogue of "seq".

Here are some of my attempts

  Ls:='seq'(a[j],j=2..p);
eval(Ls,p=5);
subs(p=5,Ls);
Ls:=seq(a[j],j=2..5);
Ls:='seq'(a[j],j=2..5);

Hi,

I have this problem when I use assume and assign a value to an assumed parameter.

Example:

restart:assume(beta>0):

g:=int(Sum(5*sin(n*beta*x),n=1..5),x) ;

beta:=1;

g;

Normaly beta:=1 is replaced into g. The result obtained is function of beta and beta:=1 is not replaced.

Why beta:=1 is not replaced in g ?

Thanks for suggestion

Following Christopher2222 request, I wrote the following procedures for "exact" cubic Hermite spline interpolation,

p:=proc(x0,p0,m0,x1,p1,m1,x)
local t,d;
d:=x1-x0;
t:=(x-x0)/d;
p0+(d*m0+(3*(p1-p0)-d*(2*m0+m1)+(2*(p0-p1)+d*(m0+m1))*t)*t)*t
end:

pb:=proc(x0,p0,x1,p1,m1,x)
local t,d;
d:=x1-x0;
t:=(x-x0)/d;
p0+(2*(p1-p0)-d*m1+(p0-p1+d*m1)*t)*t
end:

pe:=proc(x0,p0,m0,x1,p1,x...

Hello friends, help, I created a symmetric matrix whose graph is 17 * 17, but in trying to apply

I'm trying to compute the determinant of a 19x19 matrix, each with entries consisting of multivariate polynomials (polys in 6 vars, of degree at most 8).  Specifically I want to factor the determinant.  Running this on Maple 15 quickly gives an "object too large" error in the determinant function, after using only 700 MB of RAM in about 2 minutes.  My machine has 3GB of RAM, so I am confused as to why this object is "too large". 

I...