Hey guys, I've had this problem for over a year already and I never took the time to resolve it.

 

On previous version of Maple, it was always very slow to load the help menu. Now in Maple 12, it freezes Maple completely.

 

What can I do to fix this?

Hi All,

I'm trying to use implicitplot to plot a function of two variables, x and y, with the additional constraint that x > y.

Is there any way to do this?  I have tried to use assume by the command assume(x-y, positive).

Maple recognizes the assumption, but when I try to plot with this assumption imposed it just won't plot (I get "Error, (in implicitplot) could not evaluate expression")

Any idea how to do this?  Is it possible?

Thanks,

JonasM

The integral of a derivative should return the same expression, or maybe, different by adding a constant. Try something simple,

diff(2*arcsinh(x^(3/2)/sqrt(2))/3,x);

                               1/2  1/2
                              2    x
                            -------------
                                    3 1/2
                            (4 + 2 x )

int(%,x);

The answer is too long to paste, and I didn't check whether it is correct, or wrong.

Alec

Define the following bump function: f:=(x,a,b)->piecewise(x

I am trying to manipulate some equations of motion in block matrix form. My first attempt is with the old linalg package because I don't want the submatrices to expand until I am ready However, linalg is not working as I expected. In particular, the formation of EoM1 in the eample below does not lead the &* operator propagating into a block matrix multiplication. If there is a better way to do this with the Linear Algebra package, I would sure like to see an example. Failing that, what am I doing wrong in the linalg example?

Hello there...

I have a very simple linear optimization problem (cca 20 variables, 10 binary integers, 40 constraints), which I know runs just fine (and fast) on several machines with Maple 11 or 12 installed. However, none of my three computers with Maple 12 can handle it: Maple always crashes during LPSolve execution.

Suppose I made a 3D geometric diagram in Maple. I want to put it on a web page, so that anyone browsing there can see it and rotate it... Like this one.... http://www.javaview.de/demo/PaViewModels.html Does JavaViewLib work with Maple 12? The latest mention seems to be Maple 10 in 2007... Alternatively, what other ways are there to do this?

I have encountered an error with plots:-pointplot. > plt:=plots:-pointplot([ [1,1],[2,2] ],color=[COLOR(HSV,1,1,1), COLOR(HSV,1/2,1,1)],style=point,symbol=solidcircle,symbolsize=15); plt := PLOT(POINTS([1., 1.], [2., 2.]), STYLE(POINT), SYMBOL(_SOLIDCIRCLE, 15),COLOR(RGB, Array(1..6, [...], datatype = float[8]))) As you see the input list is using the HSV scheme but in the output it has been switched to RGB. This of course is reflected in the actual plots.

Hi all,

I am new to this forum and to Maple, I would appreciate some help. As you can read from this post

http://www.mapleprimes.com/forum/integralslongsumsandkernelconnectionlost

I am trying to evaluate an integral of a long sums of functions. In that post (still unanswered) I report a kernel connection lost. I have now raised the datalimit to my physical limit, so that the "kernel connection lost" error has disappeared (for now). The real problem is that I need to increase the order of my Fourier Series up to eight terms or more.

Questions:

Hi all,

I am attempting to solve the following coupled, non-linear system of equations:

F:=(x,y)->x*(1-G(x,y)/y*(1-G(x,y)))^2;

G:=(x,y)->y*(1-F(x,y)/y*(1-F(x,y)))^2;

In particular, I want to know under which conditions for x and y it is true that F(x,y) = G(x,y)

Can this be solved as a fixed point DE (to get two equations with two unknowns) ?

My attempts at computing the partials has so far failed:

diff(F(x,y),x);
Error, (in F) too many levels of recursion
 

Any hints would be most welcome!

Wolfram Alpha is launching in May - that looks interesting.

Alec

You can duplicate this in Maple 11 or Maple 12: restart; L:=Array(1..10, j->rand(0..1)()); L := [0, 0, 0, 1, 0, 1, 1, 1, 0, 1] restart; L:=Array(1..10, j->rand(0..1)()); L := [0, 0, 0, 1, 0, 1, 1, 1, 0, 1] restart; L:=Array(1..10, j->rand(0..1)()); L := [0, 0, 0, 1, 0, 1, 1, 1, 0, 1] restart; L:=Array(1..10, j->rand(0..1)()); L := [0, 0, 0, 1, 0, 1, 1, 1, 0, 1] restart; L:=Array(1..10, j->rand(0..1)()); L := [0, 0, 0, 1, 0, 1, 1, 1, 0, 1]

The maplev emacs mode provides a means to communicate to the tty (command-line) maple process.  Alas, the method is rather crude; I designed it that way because it was all I knew how to do.  However, I would really like to improve it; I'm looking for advice. 

I was considering what sorts of "normally coded" things might get broken by the loading of a Maple Library package and the ensuing rebinding of names.

And so I tried this,

> with(RealDomain): # rebinds sin

> convert( cos(x), sin );
                                     sin(2 x)
                                 1/2 --------
                                      sin(x)

I was actually surprised to see that work OK. I was expecting `convert`...

I have recently been working on a problem using fractional calculus and have come across something in Maple's fracdiff  command that makes no sense to me.

Consider the function y:=a+b*(x-q)+c*(x-q)^2

z:=subs(x=q,fracdiff(y,x,1)) gives the correct answer of z:=b, z:=subs(x=q,fracdiff(y,x,2)) gives the correct answer of z:=2c, z:=subs(x=q,fracdiff(y,x,3/2)) gives the answer of z:=4*sqrt(q)*c/sqrt(pi)