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

Hi,

I want to solve 2 linear equations in p[1] and p[2] 

eq3 = -(1/8)*(x^2+y^2+((x^2+y^2)^2+2*(omega[1]-omega[2])*(x^2-y^2)+(omega[1]-omega[2])^2)^(1/2)+omega[1]-omega[2])*(x^2*p[1]+2*x*y*p[2]-y^2*p[1]-((x^2+y^2)^2+2*(omega[1]-omega[2])*(x^2-y^2)+(omega[1]-omega[2])^2)^(1/2)*p[1]+omega[1]*p[1]-omega[2]*p[1])/(y^2*x*(omega[1]-omega[2])) - P[1];
eq4 = -(1/8)*(x^2*p[1]+2*x*y*p[2]-y^2*p[1]+((x^2+y^2)^2+2*(omega[1]-omega[2])*(x^2-y^2)+(omega[1]-omega[2])^2)^(1/2)*p[1]+omega[1]*p[1]-omega[2]*p[1])*(x^2+y^2-((x^2+y^2)^2+2*(omega[1]-omega[2])*(x^2-y^2)+(omega[1]-omega[2])^2)^(1/2)+omega[1]-omega[2])/(y^2*(omega[1]-omega[2])*x) - P[2]

solve({eq3,eq4},{p[1],p[2]});

I don't receive any answer. Why?

plz code and sole that this integral!!!!!!!!!!

!!!

Hello people in mapleprimes,

I hope that you will give me an answer about the calculation surrounding D.
D((x+y)^2) can be calculated with maple, but D((x+y)^a), where a is a constant, cannot at least directly.
And, I have the code, which Mr. Carl Love kindly gave me at
http://www.mapleprimes.com/questions/218045-Logarithmic-Derivative
, which is

h:= F-> expand(evalindets(D(F)/F, specfunc(D), d-> op(d)*'h'(op(d))));

This works for (x+y)^2, but does not work for (x+y)^a.
And, I think this reason is that the behavior of D to (x+y)^2 is not the same
 as that to (x+y)^a.
And, I want to modify this code.
But, I can't .
So, I am asking this question. How should I modify the above code so that it works for (x+y)^a.
I'm so sorry for a lot of impoliteness.
I will be very glad if you give me an answer.

Take care.

taro

I have 

dZ(x)=−xdlog(z(x))

where d is the exterior derivative. I would like to recover the function Z(x) by integrating both sides of the equation. How would I compute this in Maple?

I recently got a laptop with an HD display (2560x1440).

While I can make the maple intput (and 2D math output) big enoght via zooming (ctrl+<number>), the default plots are unusable (everything is too small). This is true for "widges" created with Explore as well.

Has anyone come across this? If so how do you deal wit this problem? 

It would be nice if Maple could scale it's interface and default sizes of various elements properly for HD displays.

I am working on a maple lab assignment and we dont actually learn maple for the class we just use it do 5 assignment the whole semster. This one consists of damping and differential equations which we have not learned. I was wondering if anyone knew how to carry it out. Well here is the part where I have an issue: 

Our solutions in the critically damped and overdamped cases approach the θ = 0 axis without crossing it, but if the initial velocity is directed toward the equilibrium position and is sufficiently large the pendulum will “overshoot”, passing the equilibrium position before settling back toward it. Experiment with this effect with a new value µ = 8 of the damping constant to give overdamped motion: introduce a new initial condition (give it a new name), keeping θ(0) = 1 but changing θ '(0) until you find a value which produces an overshoot of about 0.1 radian. Include in the worksheet only the graph showing this overshoot and the commands needed to produce that graph. In the discussion section give explicitly the value of the initial velocity that you found.

And this was the original initial condition and equation code:

K:=9; deG:=diff(theta(t),t,t) + mu*diff(theta(t),t)+K*sin(theta(t))= 0; deL:=diff(theta(t),t,t) + mu*diff(theta(t),t)+K*theta(t)= 0; Iv:=theta(0)=1, D(theta)(0)=5; dom1:=t=0..10;

I am not too sure how to manipulte this to work. Any help is welcome.