Hello,

I have a system which is below:

 

X6-n4-n2, -n3+n1, -n4*X17t+n2*X9t, n3*X17t^2-n4*X17tt-n1*X9t^2+n2*X9tt, 130*X9tt-60*X17tt*n2*n4+60*X17tt*n1*n3-40*n2*X11+981*n2+60*n2*n3*X17t^2+60*n1*n4*X17t^2, -1500*X9tt*n2*n4+1500*X9tt*n1*n3+2250*X17tt+1000*n4*X11-14715*n4+1500*n4*X9t^2*n1+1500*n3*X9t^2*n2, n1^2+n2^2-1, n3^2+n4^2-1

I need to do primedecomposition for it. Maple could not do this for me kernel was lost. However system is not very big.

With version 10, I did this:

gammadist:=(x^(alpha-1)*exp(-x/theta))/(GAMMA(alpha)*theta^alpha);

simplify(int(gammadist,x=0..infinity),symbolic);

The result of the integral is 1.

When I do this exact same thing in version 12, I get an integral without any symbolic computation.

If I use assum(alpha>0): additionally(theta>0): then it will give me the same result.  However, in version 10 I also did

mgf:=simplify(int(exp(t*x)*gammadist,x=0..infinity),symbolic);

I'm trying to make a FFT from a 2s long input file by using the obsolete FFT-procedure, but strange thing is: No matter what first argument they receive (3, 2, 1, 0 even!) the result is always the same; even more strange is: Writing out the signal after the FFT it's exactly the same as before as if the FFT never would've happened.
What am I doing wrong?

Hi, I'm working on the Smoluchowski equation (essentially the diffusion eqn with an extra derivative) diff(u(x,t),t)=k*diff(u(x,t),x)+D*diff(u(x,t),x,x) k is piecewise so the function has to be solved numerically, the boundary values are specified u(0,t)=u(1,t)=0 but i need the derivative at the boundaries D[1](0,t) and D[1](1,t). It seems to be simple to evaluate a numeric derivative of an ODE but I can't see how to do it for a PDE. Any help welcome, even some sort of brute force method if necessary. Thanks, Ryan

 

Hi,

I tried to find the limit of the following equation using l'hopital's rule, when sigma approches to zero find i couldn't find it.

Now i want to use Taylor series to find the limit of the following equation, when sigma approches zero.

hey do u know a website where i can find information about gravel pacing and screen of a bore hole..i really can't find anything

Hello everyone

I have a cost function I would like to minimize. It is a fairly simple function that only contains multiplications and additions.

Only problem is, this function has about a hundred variables, but they can only be between the interval [0,1] so I guess it makes the problem easier.

Is it possible to write a little program in maple that can be ran as much as I want it to run and that could try to find an approximation of the actual solution? (By trying random numbers between 0 and 1)

Thank you very much

Does anyone know a way of quantizing sensor data in MapleSim?

When using Threshold on an image that has been converted to grayscale is it not the same as this loop?

a:=ToGrayscale(img);

for i from 1 to Width(a) do
  for j from 1 to Height(a) do
    a[i,j] := round(a):
  od:
od:

 

 

I know it is possible to change the "Look and Feel" of Java applications, and i was wondering if there was any way to do this on Maple? (Maple 13 for Linux, to be exact.) 

I have been using MapleNet for several years mainly on Linux.
But I usually use Mac for daily research and education.

I wonder why MapleNet is not compatible with Mac OS X.
MapleNet runs on Tomcat since ver. 11 and it should be run
on Mac OS X with Tomcat. However, there is no installer
for Mac !

I would love to ask Maplesoft to support Mac OS X for MapleNet.
webMathematica is fully compatible with Snow Leopard !
http://support.wolfram.com/technotes/snowleopard.en.html

Please...

I was playing around with loops and came up with this simple while loop that is reacting different than I am expecting

a:=rand(1..10):
while a() <> 4 do print(a()); od:

the output includes 4's ??

I'm trying to pointplot two arrays (vectors) but no matter what I change in the listing below Maple 11 keeps considering the second vector as an option.

Can Maple embed ActiveX objects ?

such as discussed here www.quaccess.com/index.html