Hello,

Just a small question: what's the difference between writing

product( (2*i-1) mod 3 + 1, i=1..10 )

which incorrectly gives 105411381075, and writing

mul( (2*i-1) mod 3 + 1, i=1..10 )

which correctly gives 432...

And what's the reasoning behind this?

-- Regards,

Franky

Hi everyone,

While I am getting more and more comfortable with the document mode, I have some questions regarding the document block feature:

- What is a document block good for anyway?
- Why not have the whole document in one block?
- Can one join two document blocks?
- when do I "remove the document block"
- How can I make sure that say an informational 2-D math expression inside a document block never gets executed?
-- Can I still...

I have a problem related to solving the complex equation of dispersion relation.

In the plots some modes are missed. I dont know whay?

Is possible to help me? (m0^2<0).

restart;
 with(plots):
 rrr:=proc()
 local ce,c0,ve,va,cte,ct,me,m0,DT,n,EQ,i;
 ce:=6.2;c0:=0.25;ve:=5.25;ck:=1.06;ct:=0.243; cte:=2.515;
 me:=sqrt(((ce^2-v^2)*(ve^2-v^2)/((ce^2+ve^2)*(cte^2-v^2))));
 m0:=sqrt((c0^2-v^2)*(1-v^2)/((c0^2+1)*(ct^2-v^2)));

I write this code:

> e1 := a-3;
                             a - 3
> e2 := sqrt(6)*b+6;
                           (1/2)      
                          6      b + 6
> trac := e1+e2;
                                 (1/2)  
                        a + 3 + 6      b
> dter := e1*e2;
                             / (1/2)      \
                     (a - 3) \6      b + 6/
> dell := trac^2-4*dter;
                           2                           

Hello, I'm just starting to work with maple I'm working on Enzyme kinetics project and I have no idea how to solve ODE system using GEAR'S or A-stability methods. I'm looking for help.

What is wrong?

> restart;
> Digits := 10;
> dsys := {diff(E(t), t) = -kf*E(t)*S(t)+kr*ES(t)+kcat*ES(t),

Hi, I'm trying to calculate a few integrations:

E1:=map(int(N1),eta=eta0..eta2)

E2:=map(int(N2),eat=eat0..eta2)

E3:=map(int(N3),eta=eta0..eta2)

N1, N2, and N3 are 3x3 matrix are are functions of eta0, eta2. eta0 and eta2 are derived after several integration as well.

If i do not want to change the name "eta0" and "eta2", can i write something to indicate (eta0 for E1 is 8.3, eta0 for E2 is 4.5, eta0 for E3 is 7.9). I hope...

Hi,

given a ploynomial in three variables x,y,z, I want to check if it is nonnegative for all (x,y,z) in R^3.

I know there is a function 'verify' in maple but it doesn't work with my polynomial, I think it's too complex.

Do you have any idea which other function I could try?

Thank you

flower15

Hi, i'm trying to change Matrix([[9,8,7],[6,5,4],[3,2,1]]) into Matrix([[1,2,3],[4,5,6],[7,8,9]]). I try to use FlipDimension, it works with two steps, but i cant seem to fit it into one step. Is there a simplier thing that i could do please? Thanks.

Hi,

i've been using evalf(Pi*5.6) for my calculations. after a few steps of calculations, some of the values are as small as 7.4x10^-9 . These small values are insignificant to my calculations. how should i ask maple to ignore all the positive and negative values that are smaller than 1x10^-9?

Please advice. Thanks

there are four points :

O = (0, 0), P = (0, b/d), Q = (beta/delta, 0), R = ((-d*beta+b*gamma)/(-delta*d+gamma*c), (beta*c-delta*b)/(delta*d-gamma*c))

and then  define the jocbian maxtrix as

J=Matrix(2, 2, {(1, 1) = beta-2*delta*x-gamma*y, (1, 2) = -x*gamma, (2, 1) = -y*c, (2, 2) = b-2*d*y-c*x})

at last , i want to get the jocbian matrix at the four points,  so  must substitute the coordinate of the four point into the...

How generate all possible samples of size n = 2 that can be drawn with replacement from this population [0,1,2]?

It occurs to me using these commands.

 restart; with(combinat); choose([0, 0, 1, 1, 2, 2], 2);

        [[0, 0], [0, 1], [0, 2], [1, 1], [1, 2], [2, 2]]

 permute([0, 0, 1, 1, 2, 2], 2);

[[0, 0], [0, 1], [0, 2], [1, 0], [1, 1], [1, 2], [2, 0], [2, 1], [2, 2]]

I am planning to use the "schedual task" in windows to try to launch
maple in the background (run under some different user account)
to do some computations.

For this pupose I have designed a little counter that is located in the
Start up code region:

for i from 0 to 100 do
if DataTable1(1, 1)=i then DataTable1(1,1):=i+1:  break; end if:
end do:

the DataTale will tell me how many times the worksheet has been opened
just to check...

For MathieuA and MAthieuB:

Values returned by MathieuA  and MathieuB are characteristic values  of the corresponding Mathieu function only when v  is a rational number and MathieuA  and MathieuB  return a different number only when  v  is an integer.

You can see a plot on maple pages for a0, a1,.. a4. And b1, b2,..., b5.

However, I would like to plot characteristic values for non-integer values. I would like to do this...

I have to plot a variable in a diagram which is updating itself. The Variable is the area of a various triangle and the  value has to be plotet in a view of the triangle. How to do this?