The command 

restart; st := time(): FunctionAdvisor(EllipticE); time()-st;

produces the result on my comp in 805.484 s. Too much time.

Dears;

Hope everyone is fine. I am try to find the numerical solutions of system of nonlinear algabric equation via newton's raphson method in the attached file but failed. Please see the attachment and try to correct. You can solve it least square method if possible. I am waiting your positive response. 

Help_in_Newton.mw

With my best regards and sincerely.

Muhammad Usman

School of Mathematical Sciences 
Peking University, Beijing, China

Email: muhammadusman@pku.edu.cn

Both the commands 

maximize(x*sin(t)+y*sin(2*t), t = 0 .. 2*Pi)assuming x>=0,y>=0;
minimize(x*sin(t)+y*sin(2*t), t = 0 .. 2*Pi)assuming x>=0,y>=0;

output 0. Simply no words.

The following three commands 

plots:-implicitplot(3*cos(x) = tan(y)^3, x = -Pi .. Pi, y = -(1/2)*Pi-1 .. (1/2)*Pi+1, thickness = 3, crossingrefine = 1, rational = true, signchange = true, resolution = 1000, gridrefine = 2);
plots:-implicitplot(3*cos(x) = tan(y)^3, x = -Pi .. Pi, y = -(1/2)*Pi-1 .. (1/2)*Pi+1, thickness = 3, crossingrefine = 1, rational = true, signchange = false, resolution = 1000, gridrefine = 2);
plots:-implicitplot(3*cos(x) = tan(y)^3, x = -Pi .. Pi, y = -(1/2)*Pi-1 .. (1/2)*Pi+1, thickness = 3, crossingrefine = 1, rational = true, resolution = 1000, gridrefine = 2);

produce the same incorrect plot 

It is clear the sraight lines given by y=Pi/2 and y=-Pi/2 are superfluous. It should be noticed that the Mmma's ContourPlot command without any options produces a correct plot.

Hi, I'm trying to use Maple to construct some examples of symmetry solutions for certain nonlinear PDE's.  As a warm up, however, I'm working through the commands just for the heat equation in 3d: u[t]-u[x,x]-u[y,y]-u[z,z]=0 

I've gotten Maple to produce both determining equations for the symmetry infinitesimal generators via the DeterminingPDE command.  I've also gotten the command Infinitesimals to work too.

However, when I next use PDETools Invariants command, it correctly outputs invariants for most of the generator output of Infinitesimals EXCEPT it won't output anything for the simple rotation generators yd[x]-xd[y].  It will, however, output invariants if the rotation is between an independent and the dependent coordinate.

An example:
with(PDETools)
S:=[_xi[x]=y, _xi[y]=-x, _eta[u]=0]
Invariants(S,u(x,y))

*Above returns nothing, But if you instead have _xi[x]=x and _xi[y]=y then it returns the right invariants.

Thanks in advance!

Up to http://www.maplesoft.com/support/help/Maple/view.aspx?path=solve&term=solve

 Let us consider 

solve({x > -Pi, (tan(x)-tan(x)^2)^2-cos(x+4*tan(x)) = -1, x < Pi}, [x]);
                               []

We see the command omits the solution x=0 without any warning. It should be noticed that Mathematica solves it, outputting

{{x -> 0}, {x -> 0}}

and the warning

Solve::incs: Warning: Solve was unable to prove that the solution set found is complete.

One may draw a conclusion on her/his own.

Hey, this is not the I've had this encounter. I want to open this saved document but when I open it and Maple starts up it just hits me with "A problem was encountered while opening the workbook. Database is not opened". How can I get to open it properly and see my math notes?

How can this be prevented?

When I try to upload the file in this message it says "Cant open a null file"

Any help?

Jacob

In manual solution is no problem, but i am interest to compute it with any software such maple since i am not familiar, How to find solution in term of parametric equation a(r), b(r), c(r) for r=-5..5 and also visualize this three derivative condition? d(a)=a+b+c, d(b)=a-b+c, d(c)=a-b-c

Does anyone know how to take a Maple plot and convert it to FITS format?  FITS is commonly used in astronomical images and stands for Flexible Image Transport System.

Thank you very much !

Hey, I recently switched to Maple 2016, but now whenever I write equations in the text field it calculates it like if it was a math problem it had to solve, but I just want it to be text, nothing else.

Do you know of any way to turn this off? As in Maple 2015 I could write equations in the text field, and when I ran the worksheet through it wouldn't try to calculate text fields, but 2016 calculates the text fields and shows the solution as a blue text... So annoying.

If I was to project a squared profile onto a cylinder. Would mable be able to help me calculating the area that is projected onto the cylinder?

Since the cylinder walls are curved I assume that the are projected on to the curved surface which is the wass of the cylinder is bigger then side*side.

In the link I tried to sketch the "problem" the red square represent the area I want to project onto the cylinder.

https://i.gyazo.com/4113ad5255385b438c8872941e14baf1.png

Thanks

Hello,

I want to use Maple from a good text-editor. I heard about EMACS and MapleV.

I have installed Maple 18 (windows 10) and GNU Emacs 25.1.1 (x86_64-w64-mingw32) and Joe Riels mapleV Emacs Mode 2.33. I tried to follow all steps in the Install-Dokumentation  doc/maplev.html#Installation, I failed at A.1 Emacs Files.

My Emacs lisp files located at:  

Byte-compile them from Emacs with the command

gives the result:

With the Syntax without leading point (as in documentation)

gives the result:

Who knows, whats wrong? I've never used Emacs before.

Hello,

my problem is, that the time or profiling results are not fine enough.

For example time is only measureable in a 16ms step on my system. Is there any way to measure time more fine, perhaps in a 1ms step or nanoseconds?

Hello everybody,

I develop a simulator of dynamical systems governed by ODE systems.
Thanks to intensive upstream testing I have already identified some "methods" that work well on some classes of systems and poorly for some others (here "method" is intented in the sense of dsolve(..., numeric, method=...)), but it is rather difficult to know in advance if method A will perform well or not, or if method B could be better ...
This is very classical.

On the other side, people this simulator is designed for, do not want to use directly MAPLE to  choose a method among all those it proposes,nor to adjust the many parameters some methods can have

The idea I have in mind is to facilitate their choice by developing a specific Maplet. This Maplet could take as a model the pane dsolve[interactive]() opens when you select the numerical solving strategy.
As far as possible I would like to customize this pane for it be closer to our own needs (specific options sholud be proposed as well as personal help pages)

So my questions:

1/  Is the corresponding code avaliable (I failed to find it while using showstat) ?
1'/ Incidentally, even if this simulator is designed for internal purposes alone, is there some kind of copyright or usage limitations of the code above ?
2/ Is it possible to obtain the list of all the avaliable methods (euler, rk4, gear, ...) without without constructing it manually ?
3/ Once a method is choosen, is it possible to obtain the list of all its options (here again without without constructing it manually) ?

Maybe a quite unusual request on this site but I would greatly appreciate any answer

Thanks in advance