The graph we draw in the graph theory package appear to be vectorial. So the export pdf is also clear. 

with(GraphTheory):
DrawGraph(PathGraph(2), stylesheet=[vertexborder=false,
vertexpadding=5,edgecolor = blue,vertexcolor=black,edgethickness=2],size=[250,250])

draw1.pdf

We know that DrawGraph only offers straight forms for drawn edges.  Sometimes we need to draw graphs with curves.  But when I try to use maple, I find that the vertices (by pointplot) are blurred after zooming in (or even without zooming out).

with(plottools):    
with(plots):
Bezier:=proc(x0,y0,x1,y1,x2,y2,x3,y3)
local f,g,c,l1,l2,l3,p0,p1,p2,p3;
f:=t->x0*(1-t)^3+3*x1*t*(1-t)^2+3*x2*t^2*(1-t)+x3*t^3:
g:=t->y0*(1-t)^3+3*y1*t*(1-t)^2+3*y2*t^2*(1-t)+y3*t^3:
c:=plot([f(t),g(t),t=0..1],thickness=2,scaling=constrained, color=blue,axes=none):
p0:=pointplot([x0,y0],symbol= solidcircle,symbolsize = 50,color=black):
p1:=pointplot([x3,y3],symbol= solidcircle,symbolsize = 50,color=black):
display(c,p0,p1,size=[300,300]);
end:

x0:=0:   y0:=0:
x1:=-0.2:  y1:=0.2:
x2:=0.5:  y2:=0.2:
x3:=0.3:  y3:=0:
p:=Bezier(x0,y0,x1,y1,x2,y2,x3,y3)

 draw2.pdf 

How to make these vertices vectorially drawn (like DrawGraph)？

How can we unveil all the possible transformations that reduce the number of independent variables of a given pde? I tried it by using "InvarientSolutions" which gives eight possible transformations. But under those transformations, I got only two different odes. Is there any other method/command from which we can get other possible odes of a given pde?

pde_ode.mw

I have in internal procedure ppp that has an input prjpsn:=3. This set a Vector positions of x,y,z to either if prjpsn=1 

zpsn=1,   xpsn=2,  ypsn=3

or if prjpsn =3   

xpsn=1,   ypsn=2, zpsn=3

This then are used in another procedure. I can't get the values to transfere.  prjpsn would default to 3 in the module but can be set externally to 1 if needed.
The relevant parts are highlighted in green text. Cant get the worksheet to display.

Maple Worksheet - Errorprjpsn:=3


Failed to load the worksheet /maplenet/convert/Q_14-12-22_Module_internal_settings.mw .

Download Q_14-12-22_Module_internal_settings.mw

Let a, b, c, d be real numbers. Define two geometric regions implicitly: a＋b＋c＋d＞0∧ab＋ac＋ad＋bc＋bd＋cd＞a²＋b²＋c²＋d², and abcd＞0∧abc＋abd＋acd＋bcd＞0. Suppose that somebody wants to prove that the former region is a subset of the latter one. Can we implement such an implication simply using certain ready-made commands in basic Maple? In other words, it is hoped that 

restart;
RealDomain:-simplify(forall([a, b, c, d], a + b​​​​​​​ + c + d > 0 and a*b + a*c + a*d + b*c + b*d + c*d > a^2 + b^2 + c^2 + d^2 implies a*b*c*d > 0 and a*b*c + a*b*d + a*c*d + b*c*d > 0));

Unfortunately, simplify just returns the statement unevaluated. So, how to address it in internal Maple? 

Note. The desired result (or return value) is true (see below).

1. restart; # Do not with(Logic): here
   RegularChains:-SemiAlgebraicSetTools:-QuantifierElimination(&A [d, c, b, a], ((d + c + b + a > 0) &and (b*a + c*a + d*a + c*b + d*b + d*c > a^2 + b^2 + c^2 + d^2)) &implies ((d*c*b*a > 0) &and (d*c*b + d*c*a + d*b*a + c*b*a > 0)));

2. restart;
   not SMTLIB:-Satisfiable(`not`(a + b + c + d > 0 and a*b + a*c + a*d + b*c + b*d + c*d > a^2 + b^2 + c^2 + d^2 implies d*c*b*a > 0 and a*b*c + a*b*d + a*c*d + b*c*d > 0)); # assuming real 

​​​​​​​​​​​​​​​​​​​​​Either ⒈ or ⒉ needs external calls. It seems that the Maple standard library functions in List of Commands still fail in simplifying expressions in the aforementioned form. Am I right?

File:

Solution_Methods.mw

Download Solution_Methods.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? 

Hi there,

I updated to Maple 2022 recently. One problem I am facing is how after I write the code and get the output, which can be text or equations or plots, etc, when I try to copy it to MS Word for example, I don't have the option of "Copy as Image" anymore. This option was available in previous versions. So was it taken out in this version? If yes, what's a subtitue for that?

I am using Maple for a school project and need to be able to copy the 2D output to MS Word just like the previous versions of Maples did.

Regards

I am trying to run this procedure, but am getting an "Error, missing operation", highlighting the conditional break:

is_prime := proc()
     local i, x_check;
     printf(`Enter an integer to check if it is a prime number...`);
     x_check:=parse(readline(terminal));
     if x_check<=2 then
         printf(cat(x_check,` is a prime number.`));
     else
         for i from 2 to x_check-1 do
               if (irem(x_check,i)=0) then
                  printf(cat(x_check,` is not a prime number.`));
                  break 2;
             end if;
           end do;
         printf(cat(x_check,` is a prime number.`));
      end if;
end proc:

If I don't include the integer, I am able to run the procedure, but it does not function like I would like it to. I am running Maple 2022, and can sucessfully run the example conditional break code in the Help. What is wrong with my use of break?

GraphTheory/IsHamiltonian says that the method can be one of legacy, sat, or tsp. But why method = tsp brings about an error? 

GraphTheory:-IsHamiltonian(GraphTheory:-CompleteGraph(3, 3), method = tsp); # Maple 2022.2

Attachment: HamiltonianGraphQ.mws

I am trying to use the perpendicular symbol ⊥ as a superscript. Can this be done? For somereason the document will not displat?

Maple Worksheet - Error

Failed to load the worksheet /maplenet/convert/Q_10-12-22_Polar_point_line_symbol.mw .

Download Q_10-12-22_Polar_point_line_symbol.mw

I have a problem in my document (MapletsDisplayError.mw) with the following four lines of code

with(Maplets[Elements]);
maplet3 := Maplet(MessageDialog(warning, "No file containing dissociation constants found.", 'onapprove' = Shutdown()));
with(Maplets[Elements]);
Maplets[Display](maplet3);

Attached are two documents.  The first contains just the lines above and works fine.  The second generates an error when run if you choose No to both dialogs, and the error appears to be with the same four lines of code (if I comment those lines I do not get an error).

ThisWorksWithoutError.mw

MapletsDisplayError.mw

Hello.

I was wondering if it was possible for maple to automatically type in the values of the variables when calculating like

U:=50V

R:=10ohm

U/R=50V/10ohm=5A

instead of just typing

U/R=5A

hope my question makes sense :D

Let x, y, z be nonnegative real numbers. Obviously, x³+y³+z³-4xyz is not always nonnegative, since its value is -1 when x=y=z=1. But why Maple's minimize gives wrong result? 

minimize(x^3 + y^3 + z^3 - 4*x*y*z, x = 0 .. infinity, y = 0 .. infinity, z = 0 .. infinity);

Attachment: MinValue.mws.

MMA's Minimize finds correct infimum: 
So, can Maple always find correct exact (i.e., not just numerical) global minima (or maxima) at least for such problems with a small number of variables as well?

Wanted to plot a vector with the arrow function

for some reason the arrow head was not created. tried changing the input so the resulting coordinat would be [10,10] insted of [725,350] this created an arrowhead on the line.

with(plots):
with(plottools):
l1 := arrow([0, 0], [725, 350], 0.1, 0.4, 0.1, arrow, color = red, legend = "Vector v");
display(l1, axes = frame, view = [0 .. 900, 0 .. 500]);

Why does it not create the arrow head happen???

Either I am clueless (or very tired) or StringTools:-Remove is not behaving as it should (document attached)

IsThisABug.mw

I would like to be able to use python's matplotlib from Maple. I am doing the following currently

with(Python)
Start('home' = "/opt/anaconda3/lib/python3.9", 'path' = "/opt/anaconda3/lib/python3.9/site-packages")
ImportModule("matplotlib as mpl")

and the error I get back is

Error, (in Python:-ImportModule) ModuleNotFoundError: No module named 'matplotlib'
['Traceback (most recent call last):\n', '  File "<string>", line 1, in <module>\n', "ModuleNotFoundError: No module named 'matplotlib'\n"]

The string I passed into path is the directory where matplotlib seems to be located as far as I can tell. I looked this up in my IDE Spyder, but using the command print(matplotlib__file__).

UPDATE: but actually if I open a new worksheet and execute 

with(Python)
Start('home' = "/opt/anaconda3/lib/python3.9", 'path' = "/opt/anaconda3/lib/python3.9/site-packages")

The error is that 

Error, (in Python:-Start) unable to start Python: could not create process, mpython

So Maple isn't finding Python apparently.

I tried for 'home' also "/opt/anaconda3/bin", did not work.