I'd like to use the Del operator in the form (A.Del)B, where A and B are vector fields. In Cartesian coordinates this is (Ax d/dx + Ay d/dy + Az d/dz)(Bx ex + By ey + Bz ez), but in other coordinate systems (which are the ones I want to use) it's much more complicated. Is there a way to use the Del operator in this form? (ex, etc. are unit vectors)

Hi, I want to plot a set of complex numbers which have the property: |z-1|/|z+1| < 2

I should get a circle but plot() only uses real numbers.

How do I? ;)

Hi Friends,

How do I speciy X-Bar in Maple 12..?

Kindly tell me , I am new user to this.

Bye

Hi, I have a function which was derived from an integral.
I want to find its inverse, or more importantly, plot ONLY the inverse of the function on the plane.
Is there a command which allows me to execute such things?
Thanks

==> Integral calculus and differential 1

Question: Being given the function f (x) =1/(3x+1),

a) By using __the definition__ of the derived function (and not the rules of derivation), determine f' (x).

b) Determine the slope of the tangent to the curve of f (x) at the point (1, f (1)).

__Instructions__: You must use Maple 12 and show your calculations.

Thank you for the assistance offered with these forums.

December 15 2008
Wcee 24
Hello,I'm trying to solve system of 3 equations for a problem of using Larrange Multiplier

> e1 := 3*x^2+3*y-a*(2*x-6);

3 x + 3 y - a (2 x - 6)

> e2 := 3*y^2+3*x-a*(2*y-6);

In order to prepar an exam, i would like to discuss about how virus spread.

I got some informations about different models, such as SI, SEI, SIR, MSEIR... and their differentiel equations

But i have some troubles to write and solve them.

i would like to use maple to modelize this propagations, but i don't know how to do at all.

Could someone give me a base, for a quite simple model such as the SI model?

Thanks

ad

I have the following functional:

I am looking for the following: given Chebychev polynomials T up
to degree n I want to express them as Legendre polynomials P.
For example one can use OrthogonalSeries[ChangeBasis] for given n.
My question is: can one give/describe/generate/... the transform
matrix for the bases directly?
The intended use is for n <= 512 (or considerably smaller), the
special case T ---> P would be enough for me.
Certainly this is classical, but I can not find it out (or looking
it up).

For structural engineering problems, when I multiply a force (N) by a distance I generally want the answer in (Nmm) or (kNm) or units of that form. Yet Maple simplifies the result to Joules, which doesn't mean a whole lot to me when I'm trying to find stresses and strains in structural members.

My question is, how can I define my own set of units that I'm comfortable with instead of having to accept the default Maple units? I'm not having a lot of success customising units with Maple.

write a maple function which takes a 2xN matrix and plots the points given by its columns on a 2D graph?

Hey altogether,

how can I solve the following problem:

for i from 1 to n do f_i := x -> i; od;

In this case f_1(x) should return 1, f_2(x) should return 2, and so on? The code above is not working because the right-hand side is not evaluated. Even trying eval/unapply/.. didn't help.

Thanks for your response,

Stefan

Good morning,

I have the following question. I write the following command

t1 := taylor( sin(x), x=0, 6);

How may I plot "t1" excluding the term O(x^6)?

plot( t1, x=-3..3) does not work -probably- because O(x^6).

Thanks in advance,

JJ

I need to plot the probability distribution function

f(x) = n!/(x!*(n-x)!*(2^(n))).

Can I just plot this as any other function using the various plot commands, or is there some statistics package option specially made for this?

Also can this distribution help me answer the question of obtaining the probability that the fraction of heads for 10, and 100 total coin tosses will be between 0.445 and 0.555?

Hi, I'm very,very new to maple, project due on monday so help needed urgently please!
I have an array (as a result of dsolve) of the form below (obviously a lot longer)
[a=0.001, b=123, c=345, d=565]
[a=0.002, b=124, c=345, d=567]
[a=0.003, b=125, c=456, d=765]
I need to plot the first and third columns against each other so I used the op function to extract these columns
arr := Array[1 .. 100];
for i to 100 do
arr[i] := [op(1, ans(i)), op(3, ans(i))]
end do
However, this gives me
[a=0.001, c=345]
[a=0.002, c=345]
[a=0.003, c=456]