I am trying make atomic variables stand out in the document, I thought they used to automatically change to a purple type colour.

So under Format, styles , I set the style to size 14, Bold, dark green.  The font changed on the existing ones but not the colour.

On new ones no setting occours just default text. I then restored to default settings under styles and they all turned purple including the new ones.

Then I made another one but no adoption of the default style (purple) occured. 

This fiddlyness needs to be improved  

Has anyone any suggestions to make the atomic variables adope their default colour etc?

in phase portrait 3d , i use 4 initial condition, How  can I draw each initial condition in diferent colour. it very helpfull so i can see the moving of each IC. Thank you

Hello! I've been trying to solve system of non-linear differential equations. The equations are quite messy, so I've attached the file itself dsolve.mw. I have read about the similar problems, but they all are related to some expressions having multiple branches. I'm not quite sure where this problem occurs (if it does) here and how to solve it.

For example if we have : a*b+c*(d+e)+f+g+h*(k*p+l):
is there a way to write a loop or script so it could give me: [a*b,c*(d+e),f,g,h*(k*p+l)]:

hi Maplers
I want to solve the following differential equation numerically. but i get error

restart;
eqn := (diff(H(K),K))^3+4*K^4*H(K)^4*diff(H(K),K)+8*K^4*H(K)^5=0;
ics := H(0)=1/2;
sol := dsolve({eqn,ics},numeric);

Error, (in DEtools/convertsys) unable to convert to an explicit first-order system

I'm learning about simplifications in Maple and I'm trying to make it simplify simple trigonometric expressions like sin(x) / cos(x) to tan(x), but it doesn't.

I tried the commands simplify(sin(x) / cos(x)), simplify(sin(x) / cos(x), trig) and nothing works. It still returns:

I managed to make it work using convert(sin(x)/cos(x), tan):

BUT it creates more problems than it solves, because if I have something like , I would like it to simplify as tan(x)*cos(x), but instead it converts everything to tan and I get a much more complicated expression:

Can someone help me please?

Why did the last line is(ysol2[1]>0) give false?

Maple does not recognize the assumption?

Thanks in advance.
 

Download Project_v1.mw

I found a new problem in Maple 2023 on windows 10.  But it is more of an annoyonus. This is what happens:

I can have a worksheet open and running somecode with lots of output generated on the screen. Everything displays fine.

Now I go and open a new application not related to Maple at all, for example if I open the task manager, this causes the Maple screen to immediately go all BLANK ! Yes, all the display is gone. I have no idea why opening a new application in new window could cause this.

Everything disappears from the worksheet except for the worksheet frame. All the menus are gone also.

But resizing the worksheet window makes everything to appear agin due to the repaint process, But I need to resize the worksheet few times to get everything to repaint fully.

So the content is still there, but it just do not show/repaint.

Note that Maple does NOT freeze or anything, it is still running and the content is there, it is just that the content becomes not visible due to opening a new application window on the side.

I have never seen anything like this in any other application on windows. I also never had this problem on same PC with Maple 2022.2.

Anyone else noticed this problem?  This is reproducible all the time. Sometimes the content will display again on its own after short amount of time, but will be missing many menu items and missing side content and so on so I have to resize the windows to make repaint eveything again. 

May be it is a Java problem. I do not know.

I have the same system as described in this post 

I will make a movie to show this very soon but I am waiting for something to finish running before I do this so I can save all my work.

Windows 10 pro, running Maple 2023 with two monitors.

Here is a small movie. I made very small example which prints number on the screen in a loop. I added a Sleep in between so it does not take over the CPU just for illustration. In my real code there is no such Sleep command.

In this movie, we see that when I open the task manage window how the display in the worksheet is gone. In this example it comes back after few seconds but all the other items in the worksheet (menus etc..) are still missing. Resizing the windows makes them appear again. In my actual code, due to the larger content, the whole worksheet remain not visible for much longer each time (I waited 5 minutes and more for it to repaint), but still had to resize it to make everything visible as in this example.

Can someone else reproduce this?

for n from 1 to 1000000 do
    print("n=",n);
    Threads:-Sleep(2);
od;

Version used MAPLE 2015.2

I use dualaxisplot and want a logarithmic horizontal axis.
I can get the expected graphic using either of these two methods

restart:
with(plots):
dualaxisplot(
  plot(x, x=0..1, color=blue, axis[1]=[mode="log"]),
  plot(1-x, x=0..1, color=red, axis[1]=[mode="log"]),
  gridlines=true
):

dualaxisplot(
  semilogplot(x, x=0..1, color=blue),
  semilogplot(1-x, x=0..1, color=red),
  gridlines=true
):

This worksheet contains my true code
(pink lines correspond to < plot + axis[1]=[mode="log"] > and blue lines to < semilogplot >).
You will see that the vertical axis for the plot declared in second position is logarithmic, whatever the way the logarithmic x-axis is defined. 
DecisionProb.mw

I am unable to find out if I made a mistake (which is likely) or if it is a bug?
Could you please have a look at this code and give me an answer?
Thanks in advance

Hi, I am looking to illustrate my lecture with Maple figures. This is in a French context, using French vocabulary. I am including my mathematical development in an appendix. I would appreciate any suggestions. Thank you for your help

G2MathDvlpt.pdf  G2.mw

File:

Opgaver_til_ULA_13_addition_af_spin.mw

So i have an exam right around the corner, and maple decided to corrupt my file. I get the error "There was a problem in the loading process, you worksheet may be incomplete." I've tried the following troubleshooting:

Restart - No luck

Other computer - No luck

Checked the backupfolder. - 10 backups have been made, but they are all corupt aswell

I've Followed Can I repair a corrupted Maple document/worksheet file? (maplesoft.com) It didn't really do anything

Also tried the DeleteBadCharacters() proccess, but i get the error "Error, (in XMLTools:-ParseString) Element type "Equation" must be followed by either attribute specifications, ">" or "/>"."

Anyone who can help me out here? 

I am porting some code I have in Mathematica to Maple. 

Mathematica has command Exponent which returns largest power on x, even if the power is not integer.

It is defined as

Maple's degree command does not allow this and returns FAIL (since it is meant to work only on polynomial, I understand that).

Is there a different command I could use which does the same as Exponent? Otherwise I have to parse it manually. The expressions will all be univariant polynomial in x, but the power on x can contain a symbol and numbers. The expression can be more complicated, but it will always have just one x in it, and I just want to extract the power in that x inside the expression.

Here are examples

degree(x^2,x);
degree(x^(n-1),x);
degree(3*x^(n+2),x);

In the above all fail except the first one which returns 2. For reference here is the result from Mathematica's Exponent command

Exponent[x^2, x]
Exponent[x^(n - 1), x]
Exponent[3*x^(n + 2), x]

I googled and could not find anything so far. I looked at PolynomialTools but do not see such command in it.

On possibility to do this manually is

get_exponent:=proc(expr,x::symbol)
   local z:=indets(expr,identical(x)^anything);
   if nops(z)<>0 then
      op(2,z[1]);
   else
      1;
   fi;
end proc;

And now

get_exponent(x^2,x);
get_exponent(x^(n-1),x);
get_exponent(3*x^(n+2),x);

2

n-1

n+2

Eitherway, if there is a builtin command in Maple, it will be better to use than my code which might still fail for some cases I did not think of.

Maple 2023

with(Units[Standard]);
A := 2*Unit('Pa');
x := 0;
sqrt(A^2);

In this example defining the 'x' variable returns an error message: "Error, (in simplify/sqrt/fraction) invalid input: denom expects its 1st argument, x, to be of type {algebraic, list, set}, but received pascal".

You can use any Unit in 'A' variable.