## Why Maple says this ode is Bernoulli when it is no...

Bernoulli first order ode has form as show in wikipedia  and also on Maple own site as

Notice that it is P(x)*y above and not P(x)* y^(-1) so the y(x) must be linear in that term.   But when I give Maple this ode

```ode:=diff(y(x),x) + x*y(x)^(-1)= y(x)^(-1);
```

Which is clearly not of the form above, it solves it as Bernoulli.  In the above ode, P(x) is x and Q(x) is 1 and n is -1.

The ode advisor correctly said it is separable. But trace shows it used Bernoulli. Also when asking it to solve it as Bernoulli, it does.

What Am I missing here?  Is it not wrong for Maple to use Bernoulli method on this ode which is not Bernoulli?

Worksheet below

 > interface(version);

 > Physics:-Version();

 > libname;

 > restart;
 > ode:=diff(y(x),x) + x*y(x)^(-1)= y(x)^(-1); IC:=y(1) = 0; DEtools:-odeadvisor(ode);

 > infolevel[dsolve]:=5;

 > dsolve(ode,y(x));  #why this says it solved it as Bernoulli ?

Methods for first order ODEs:

--- Trying classification methods ---

trying 1st order linear

trying Bernoulli

<- Bernoulli successful

 > dsolve(ode,y(x),[Bernoulli])

Classification methods on request

Methods to be used are: [Bernoulli]

----------------------------

* Tackling ODE using method: Bernoulli

--- Trying classification methods ---

trying Bernoulli

<- Bernoulli successful

## How do I fix column vectors not showing properly w...

Dear Maple community,

I was going to export my math assignment about vector functions as an PDF, when I noticed that it butchered every column vector printed out in blue in the document as math-output. I only have this issue when exporting my work.

How do I make Maple display both coordinates of vector in the blue output field?

I produced the below image as an illustration of my problem:

## gridlines do not show on axis when using cmaple.ex...

I am now running eveything in cmaple.exe for number of reasons. But I find the plot generated do not show grid lines as it does in worksheet (GUI).

Below is worksheet I used, and below that the .mpl file used for command line with the command used.

 > interface(version);

 > restart;
 > plot(x, x=0..1, axis=[gridlines=[10, color=blue]]);

 >

Here is the T.mpl file

```currentdir("C:/tmp");  #change as needed

#the following commnad below export a plot to a file

plotsetup(ps, plotoutput="t.ps",plotoptions=`color,noborder`);

p0:=plot(x, x=0..1, axis=[gridlines=[10, color=blue]]):

print(p0); #this will create t.ps in same folder

plotsetup(default); #rest back to default

quit;```

Now I run the above as follows

`"C:\Program Files\Maple 2024\bin.X86_64_WINDOWS\cmaple.exe"   T.mpl`

Next I convert t.ps to t.pdf using Adobt PDF pro. The output is this

You see, there are no grid lines. I tried changing the color to BLUE, but it made no difference. Tried difference colors also. nothing worked.

Is there a way to keep the grid lines when using cmaple.exe?

I also attached  t.pdf converted by adobe from the .ps file. Mapleprime will not let me attached t.ps file.

t.pdf

## Error, (in odetest/series) when calling 'MultiSeri...

Is this new error in Maple? I do not have older versions to check.

Solved this ode as series. When calling odetest on it, it gives this error as shown in worksheet below.

Maple 2024.1.

Any work arounds?

 > interface(version);

 > Physics:-Version();

 > libname;

 > restart;
 > ode:=-(A/( (1-x)*x^4) - B/( x^4*(1-x)^2)+C/( (1-x)*x^2))*y(x)+1/(1-x)*diff(y(x),x)+diff(y(x),x\$2)=0;

 > Order:=3; maple_sol:=dsolve(ode,y(x),'series','point'=1);

 > odetest(maple_sol,ode,'series','point'=1)

Error, (in odetest/series) when calling 'MultiSeries:-multiseries'. Received: 'unable to sort exponents, {(1-B)^(1/2), -(1-B)^(1/2), 1-(1-B)^(1/2), 1+(1-B)^(1/2), 2-(1-B)^(1/2), 2+(1-B)^(1/2), 3-(1-B)^(1/2), 3+(1-B)^(1/2), 4-(1-B)^(1/2), 4+(1-B)^(1/2)}, MultiSeries:-multiseries'

 >

## How make my plot to have a beter view and which pa...

I don't know how make my graph be beter for real part and imaginary part and abs part which part how work with parameter can any one explain on this example?

G.mw

## Set up equation for finding parameter and do odete...

i did two case of this equation and odetest is worked good but in this case the odetest is not worked well anyone can determine what is mistake ?

F_P_Correct_case_three.mw

## Error in Display the plots...

Dear Maple user I am facing error while running the codes  to plot the graph for two data sets .

I am attaching the files.

Error_in_Display_1.mw

## How to plot heat transfer rate for this problem?...

HTR.mw

In above problem, Additionally How to  plot  heat transfer rate  Q versus L^2  for distinct porosity parmeters(Sh) , using  heat transfer rate formula, Q = (q*L)/(k*A*T[b])=theta'(1).

using  [Sh = 0.1, L^2 = 0.1, Nr =0 .1, Ha =0 .1, Pe = 0.1],  [Sh = 0.3, L^2 = 0.3, Nr = 0.1, Ha = 0.1, Pe =0 .1],   [Sh = 0.5, L^2 =0 .5, Nr =0 .1, Ha = 0.1, Pe =0 .1].

## is it safe to update Physics while Maple is busy r...

I have number of worksheets open. I set each to use its own engine.

If I have one worksheet running a long loop that takes hrs to complete, or even if I have cmaple.exe running long script in command line, and then at same time I open new worksheet and type

Physics:-Version(latest)

Then I always get this error

This is described here

It seems because Maple was busy running another worksheet. I never see this error if I am not running any other thing in Maple at the time. ( I actually try not to update Physics while running something else in Maple, but sometimes I do not notice that I have something else running).

When I wait for my other worksheet to finish, then close all of Maple and reopen Maple, I see the latest version is installed, at least this is what Physics:-Version() now says.

My question is:  Is it safe to do Physics:-Version(latest) even when Maple is busy running  computation in other separate worksheet or even running cmaple.exe from windows command line? Is there any concurrency/locking issue on the Physics library being updated while it is being open by another worksheet or another server.exe running in background?

All this is on windows 10 pro.

## How find Lie symmetry of this equation ?...

I get my on results but the results are not the same please help me if i did any mistake in my code

symmetry_PDESYS_3_time_fraction[1].mw

## Plotting cross section of a dynamical systems ...

Hello everyone

Any one can help to plot a figure as follows

" A cross section of three colored basins of attraction on an (x, y)

plane at z = 0 and w = 0 for a = 2.48 and b = 0.5. Basins in green, red, and cyan leads to a strange attractor, a limit cycle, and a line equilibrium,

respectively. The yellow leads to unbounded orbits. " Where the system

xdot=y

ydot=z

zdot=w

wdot=-az-bw-y-xy.

and range of x=[-6,6] and y=[-3,6].

## Maple Programming Contest...

Hi everyone, is there any source of Maple competitions? Or related questions? I have a hard time finding books on this subject. I am very interested in Maple and hope to improve my Maple programming skills. In addition to frequently browsing this website, I encounter problems on the Internet sporadically, so I think starting with competition questions will be a quick way to improve.

## least square curve fitting ...

can someone help me curve fitting these parameeters...i only got 1 for all of this 90As4.mw

 >
 >
 >
 >
 >
 >
 >
 >
 (1)
 >
 The solution was obtained with the following warning:   no iterations performed as initial point satisfies first-order conditions
 (2)

## Fourier Series - How to solve step by step...

I apologize for putting the equations in image format, but I thought that this way the community could better understand how to interpret the equations.

Below are 6 letters whose solution must be developed step by step so that the periodic extension of each one can then be done. I can solve all the letters by hand (solving in the notebook), but my big question is, how can I do the commands in Maple step by step so that I can solve them as if I were doing them by hand (look like in my notebool)? I need to check step by step. I would be extremely grateful for the help of any of you.

second part