Hi

When I run the attached code (basically just a big loop that doesnt do anything) it terminates early (when i is about 4600).

On my computer I get the error message "kernel connection lost".

On other computers it just stops.

It seems to be quite memory intensive but I don't understand why it terminates. normally if i run a large loop it may take a long time but it will get there eventually. I dont understand why this terminates in the middle.

 

any ideas would be great!

thanks

I was running the BirthdayPi procedure that was somewhere here in mapleprimes. 

I replaced the string evalf(.. _BigPi   with evalf(Pi, 1000000) and ran the procdure.  I hit the stop hand because it was taking too long then I ran it again with a different number.  shortly after it said kernel connection lost. 

I just upgraded my memory from 1Gb to 2.5 Gb (ie I removed 2 of the 4  512 Mb chips and replaced those with 1 Gb chips).  Could that have something to do with it?

Hi all. I m using maple 11. I plot a figure with loglogplot the problem is that the number of points at the low part of the x axis is very low. I increase the number of points but because it is a logaritmic plot the step is still too large for the low numbers but too small for the high numbers. Any ideas how to solve this? Thank you in advance.

As we write a maple program to do whatever operation is, is it possible (in maple) to measure howmany operations per second was performed to achieve the desired result. Or in case of the iterative methods, how can we measure the speed by means of  iterations/second and/or the total time used to achieve the result. Is this kind of performance measurements possible in Maple?.

Thanks.

Hi

Does anyone know of any Maple training courses in the UK (preferably in London).

 

thanks

Hi, Having got to grips with the basics of Maple TA, I'm now getting fussy over details! I've been authoring using LaTeX, and I've hit a problem with plotting. I have put the following code in the question text: \drawMaplePlot*[300][300]{ plot( sin(x), x=-3.5..3.5,-1..1,tickmarks=[[-Pi=-Pi,0=0,Pi=Pi],[1,0,-1]] ) } but the tickmarks command doesn't seem to work properly. Where I expect to see Pi and -Pi labelled on the axes using the actual pi symbol, I just get the text:

I've got a weighted undirected graph with 166 nodes and 191 edges. When using EdgeConnectivity I get a strange message:

Error, (in GraphTheory:-EdgeConnectivity) invalid input: GraphTheory:-VertexConnectivity expects its 1st argument, G, to be of type GRAPHLN, but received GRAPHLN(undirected, unweighted, V, A, `GRAPHLN/table/5`, 0)

Who can help?

 

I was running on Maple 11 to calculate the determinant of large size square matrices. The matrix is sparse with floating-point entries and the size is roughly 6000*6000. Because the matrix is sparse, I set "storage=sparse" in defining the matrix, so that there is no storage problem. But when I used the command dtn:=Determinant(A, method=float) to calculate the determinant, there were the following problems:

Error, (in Matrix) Maple was unable to allocate enough memory to complete this computation.  Please see ?alloc

I'm wondering if anyone can help me track down the various methods Maple uses to solve nonlinear systems of equations. In particular, I don't need an in-depth discussion, I'm mainly interested in finding a citation or two for a paper I'm working on. I'm aware of the approach using resultants and a discussion of it in Geddes, Czapor, and Labahn (1992). I'm also aware of Groebner bases. Are there any other methods Maple uses?

Best,

Shawn

In Maple 11, the expression pallette has the following availble for click and insert:

{-x   x<a

{x   a<x

This above is combined in a single brace. I would like to add a third line to the single brace set, but I can not figure out how to do this. I tried using the piecewise command and converting it to 2D but it errors out:

 piecewise(x < -1, x^3,-1 < x <1, x,x >= 1, 1-x)

Error, unexpected relational operator

 

Can one of you Maple Gurus' help?

 

Thanks!

I'm trying to write some mapplets for my professor (in Maple 11/12). Most importantly I need a program for working with group theory.  I've looked at the help menus in maple on the group package and all of its commands, I also read all of the maple programming booklets.  Still I have no idea how to do simple things like create the group Z₂ or S₃ and Z₂ + Z₂.  I anyone has any idea on where more information on these issues might be.

Good morning.

 

I've this funny problem with maple11. I get an expression as output from a calculus, and I try to simplify it with simplify(%), but simplify don't simplify and give the same expression as result.

On the other hand, If I copy the expression and paste it as argument of simplify it work fine.

Anyone know why this happens?

 

Thank you

S.

ps: the expression to simplify (in fact is more simple than a simplification: there are terms equals but with different sign to cancel togheter) is

 

Hi

I seem to be running into problems with too much memory use during a large loop leading to maple stopping due to "loss of kernel connectivity".

 

At the moment I am "resolving" this by saving the variables that I need to continue with the run. Closing down maple manually and opening it again then restarting the loop from the index where I left off. Restarting resets the memory and I can run the code for another 1000 loops or so until I have to repeat the process.

 

If we consider the finite double sum I:=\sum{r=0}^{i}\sum{r=0}^{j}\frac{(-1)^k(i+j-r-s)! (\mu+\frac{1}{2})_{i+j-r-s}}{r!s!(i-r)!(j-s)!(k-r-s)!(\mu+\frac{1}{2})_{i-r}(\mu+\frac{1}{2})_{j-s}} where j positive integer j positive integer k positive integer such that 0\leq k\leq min(2i,2j) \mu a positive real Question: How we can use maple to justify that I is nonegative Thank you

Element(U,atomicweight) returns a mass, okay but then I choose

Element(Pu,atomicweight) does not return a mass like U but mentions it's a radioactive element and the closest is 244

Is that just the way Maple looks at radioactive elements?