I have the function f(x) = 

and x <= 20

How would I specify it in maple and then I have to take the derivative and find the critical points. I am so confused.

restart:
with(ArrayTools):
m:=<1,2,3,4|3,2,1,0|x,y,z,z0|a,a,a,a|b,b,b,b>;
lscol:=<seq(1-AddAlongDimension(m,2)[i],i=1..4)>;
m:=<m|lscol>;
UpperTriangle(m);

Hi all,

I wonder if there is a way to extract the upper/lower triangle entries from a matrix?

Basically, I want to creat a column vector of the none zero entries in "UpperTriangle(m);"

Also, aside, is there a way to quickly assign those entries...

I would like to know if there is any way to coax maple into spitting out the solution (1,1,1) for the system of equations {x²+y²+z²=3, x+y+z=3}. So far all I have come up with is

with(RegularChains)[SemiAlgebraicSetTools]:
R:=PolynomialRing([x,y,z]);
Display(SamplePoints([x^2+y^2+z^2=3,x+y+z=3],R),R);

This produces

x=1
y=1
z=1

as desired, but I would like to accomplish this without specifying the polynomial...

I've tried using Maple Help within the Maple software, but it is not very user friendly. Nothing seems to match up when I type the commands that it tells me, I always get an error. How do I find the moment generating function from a probability density function (pdf)?

Thanks.

Dear Maple Users,

I can't understand why fsolve returns "x,y in the equations and are not solved for"???

the example in attached file. qn_abt_Int.mw

thank you in advance! Any help is appreciated.

Denis

Hi!

i want to compute the differentiation of a matrix elementwise:

diff~(psi,x1);

But Maple gives only the output ~(diff(3x15 Matrix))

What do I have to do?

Thank you for suggestions!

I am trying to find the coordinate vector of v and w with respect to the basis T.

v= <1,5>  

w= <5,4>

T= [<1,1>|<2,3>]

I found this help page:

http://www.maplesoft.com/support/help/Maple/view.aspx?path=Task/VectorCoordinateVector

"Enter a vector in the vector space spanned by this basis"  -how do you know what to put in?

> V:=...

Hello,

I have defined a function(say fun) to do certain task, it works well when I call it from a script file(say script1). However, when I copy the complete script1 and paste onto another script file(say script2), the function, fun, doesn't execute. It's very peculiar as my project requires lot of modification, so I copy the old script and...

Hello every one,

I am gettting this error "unable to store HFloat", while solving a system of ODES numerically.

restart:

eq1:=n*(-diff(f(eta),eta$2))^(n-1)*diff(f(eta),eta$3)+(2*n/(n+1))*f(eta)*diff(f(eta),eta$2)

-diff(f(eta),eta$1)^2-M*diff(f(eta),eta$1)+M*epsilon+epsilon^2+lambda*f1(eta)=0;

eq2:=diff(f1(eta),eta$2)+P*(2*n/(n+1))*(f(eta)*diff(f1(eta),eta$1))=0;

bc:=f(0)=0,D(f)(0)=1,D(f1)(0)=1,D(f)(N)=epsilon,f1(N)=0;

If S= { <0,1>,<1,2>} and T={<1,1>,<2,3>} are ordered bases for R² and v=<1,5> and w=<5,4>, then can someone help me:

-find the coordinate vector of v and w with respect to the basis T by creating a procedure?

-I can make a procedure to find the transition matrix P_S<-T from T to S-basis, but can you help find the coordinate vector of v and w with respect to the basis S. Using P_S<-T?

Hi guys, I would like some help writing a procedure that checks whether the group of input vectors is an orthogonal basis. Any help would be great!

How does one change a previous Atomic setting back to non-Atomic?  This seems so simple, but I can't find anyway to Undo this change.  

Thanks,

Dear Mapleprimes,

I am trying to solve an Optimization problem analytically. I set up a lagrangian as follows:

L:= Objective function + mu_1 (constraint 1) + mu_2 (constraint 2)

I maximise with respect to two variables, call them x1 and x2

I want constraint one to bind but not constraint 2. Hence, I set mu_2=0. The I do:

diff(L,x1); diff(L,x2), diff(L,mu1), diff(L,mu2)

Hi!

I want to claculate a triple integral of a piecewise function. The piecewise function has 17 domains and I guess that this is a bit too much.

Is there any possibility to optimize it?

the piecewisefunction looks like this:

a := unapply(piecewise(
    x1 < 0 or x2 < 0 or x3 < 0 or h < x1 or h < x2 or h < x3, 0,
    0.5*h <= x1 and x1 <= h and h-x1 <= x2 and x2 <= x1 and h-x1 <= x3 and x3 <= x1, A1[13],

Hello,

I am trying to force Maple to read big matrices from files, produced by other programs (GAP in my case).

The output looks like this after it's been saved in a *.txt file:

[ [ 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0,