Hi,

I'm using Maple 14 and have a function in several variables, which I want to minimize. As far as I know, to guarantee that NLPSolve (from the Optimization package) is really finding a global minimum, this function must be convex.

What is the best way to test for convexity in Maple?

Thanks in advance,

Carlos Mallen

i am plotting multiple plots in one graph using the following commands. This has been successful for a different function but it doesnt work at all for the typed function. can you pinpoint my mistake? maple sheet is attached as well.

> restart;
> w(r):=1+(S)/(2)*[(r^(2)-1)/(2)-4*ln(r)]-(b*S^(3))/(4)*[(r^(4)-1)/(4)+128*((1)/(r^(2))-1)-6*(r^(2)-1)+48*ln(r)]+(3* S^(5)*b^(2))/(8)*[80*(r^(2)-1)-5*(r^(4)-1)-640*ln(r)-640*((1)/(r^(2))-1)+(r^(6)-1)/(6)+256*((1)/(r^(4))-1)];

How do you get equation from user in middle of a procedure? I tried to use the GetEquation of Maplets[Examples] but I cannot make a function out of it. The sheet is something like:

Hi

i need help

i want calculate the sum of digits after a comma

My function is f(t)=(4bcos(t)^3,4bsin(t)^3).

I need this function's lenght of ARC and fonction of lenght of ARC.  t=0.  Maybe i need this graphic. 

Please help me. Thank you...

I want to minimze VaR (the 5th percentile for the return distribution) with LP.
However, the way I have specified the problem does not work for some reason, why?


restart:
with(Optimization):
with(LinearAlgebra):

nstock := 20:
n := 15:

R := RandomMatrix(n, nstock, generator = -15 .. 15, outputoptions = [datatype = float[8]]):
W := Matrix(nstock, 1, [seq(w[i], i = 1 .. nstock)]):
data1 := Array(Multiply(R, W));

Hi. Solving a problem of non-linear oscilations of thin string I met a PDE with unusual bcs at the right side of the string: 
 , where phi is known function. Can...

Your worksheet may be incomplete"

Hi, I use maple 12 for mac, I have an exam at 9am, it's almost 3am and my whole exam notes (open "maple" exam, as opposed to open book) have just corrupted.

PLEASE HELP ME.. :(

2p81_final.mw

Download 2p81_final.mw

 

I am not quite sure wether this question belongs into this Forum but i will post it anyway (plz just give me a hint if i am wrong here).

In the Maple file i attached i wrote a solution for the Kepler-Problem(eq1) which i developed with Maple. I isolated r and simplified the result (eq2a).

However solutions from text book look a little different (it can be seen in Whatitshouldbe). I am sure that both functions are the same (i plotted both functions...

Hello

i want to simplify this expression (f@f@...@f@f)(x)

f is repeated "n" times

e.g: for n=3

we found (f@f@f)(x) .

help me please.

Hi,

I would like to calculate the inverse fourier transform from this: 

And I get this:

Hello! How i can write this expression in maple?

ma × (Ω' × a )

where is

Omega := Vector(3, [Omega1, Omega2, Omega3])

dT := proc (f) options operator, arrow; add((diff(f, var[k]))*dz[k], k = 1 .. N) end proc

a := Vector(3, {(1) = Ri*n1, (2) = n2*Ri, (3) = n3*Ri-R0})

f(t)=(cost,sint,cos2t)

I need necesary commands in order to draw to f( t)...'s tangent at t=pi/3. Could you help me

Hi

I'm solving a differential equation which has a boundary at infinity, when I add this third condition it returns nothing. Of course I it's easy to solve by hand but it should be done in a loop. can you give me a hint on this?

Thanks

Hi guys

i have a problem to drawing this function

problem is F(r,theta)=sin(6r) /6r   IF r is not 0

          and F(r,theta)=1               IF r is 0

Thanks for your helps