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why odetest(sol,ode) do not give zero, but odetest...

Asked by: nm 11693
Yesterday at 8:27 PM
1  2

How to explain this strange behavior?   odetest(sol,ode) does not give zero. But odetest(sol,[ode,IC]) gives [0,0]

Same solution and same ode. Why adding IC, now odetest says solution verifies the ode, but without adding IC, it does not give zero right away. I know I can simplify the result to zero. But the point is that it should have given zero right away, because that is what it did when adding IC.

Should it not have given zero in first case also?

Can't upload worksheet due to security. Here is code and screen shot

ode := diff(y(x),x) + cos(1/exp(2*x))*y(x) = sin(1/exp(x));
IC := a*D(y)(x0)+c*y(x0) = b*y0;
sol:=y(x) = ((-cos(exp(-2*x0))*a + c)*Int(sin(exp(-tau))*exp(-1/2*Ci(exp(-2*tau))), tau = 0 .. x0) + Int(sin(exp(-tau))*exp(-1/2*Ci(exp(-2*tau))), tau = 0 .. x)*(cos(exp(-2*x0))*a - c) + exp(-1/2*Ci(exp(-2*x0)))*(a*sin(exp(-x0)) - b*y0))*exp(1/2*Ci(exp(-2*x)))/(cos(exp(-2*x0))*a - c);

odetest(sol,ode);

#not zero

#now

odetest(sol,[ode,IC]);

#gives [0,0]

 

how to solve coupled pde...

Asked by: KIRAN SAJJAN 55
homework pde pdsolve
December 11 2025
0  5

Variation of (a) Skin friction ∂W/∂Z​, (b) Heat Transfer ∂θ/∂Z​, and (c) Mass Transfer ∂Ï•/∂Z​ for γ=10.0, Pr=7.0, ε=1.0, Nt=0.4, and Nb=0.2.

10.0   0.03301 1.90406 0.21772
20.0   0.01212 1.90403 0.20269
30.0   0.00727 1.90402 0.19325
40.0   0.00522 1.90400 0.18645


how to get this values by solving the PDE by using the pdsolve method 

Variation of (a)W(b) θ and (c) Ï• for different value of γ when ε = 10.0, Nb = 0.4, ε = 10.0, Sc = 0.5 and Pr = 7.0.
consider X as 0.1

plume_work.mw

Unable to upload worksheet to MaplePrimes....

Asked by: nm 11693
worksheet attachment
December 10 2025
0  5

Why one is no longer able to upload worksheet here showing a problem? I found an internal error in int() but can't upload worksheet.

When I click on the green arrow and select my worksheet, I get this message

What is going on? I am on windows 10 and I tried 2 different browsers. So the problem is on the Mapleprimes site.

Can anyone else try to upload a worksheet to test to see if they get same problem?

I have a problem after downloading Maple 2025.2...

Asked by: FDS 220
December 08 2025
0  8

I frequently receive this message after installing the most recent Maple update:

Can anyone help me with this? Thank you so much for your valuable support.

GUI fonts are too small...

Asked by: ahmedfr 15
linux gui zoom
December 05 2025
3  1

Hello,

I have upgraded to maple 2025, but the ui fonts are too small and very thin. I went to Files -> Options -> Interface -> Default Zoom, thet sat it up to 150%. It only changed the document area not the UI options. This solution used to work with Maple 2024. I am on ubuntu 22.04.

dsolve gives division by zero when using Lie metho...

Asked by: nm 11693
ode dsolve differential-equations
December 02 2025
3  1

DO not know if this is new in Maple 2025.2 or not as I have not looked yet if it is possible to install Maple 2025.1 on my new PC given Maple 2025.2 is already installed.

Found That Maple 2025.2 gives "Error, (in dsolve) numeric exception: division by zero" when asked to solve this ode using Lie symmetry.  The error comes when it tried to 

                        Computing canonical coordinates for the symmetry 

Even if this problem was in earlier Maple versions, this ofcourse should not happen.

> 

interface(version);

`Standard Worksheet Interface, Maple 2025.2, Windows 10, November 11 2025 Build ID 1971053`

> 

Physics:-Version();

`The "Physics Updates" version in the MapleCloud is 1882 and is the same as the version installed in this computer, created 2025, December 1, 6:58 hours Pacific Time.`

> 

SupportTools:-Version();

`The Customer Support Updates version in the MapleCloud is 29 and is the same as the version installed in this computer, created June 23, 2025, 10:25 hours Eastern Time.`

> 

libname;

"C:\Users\me\maple\toolbox\2025\Physics Updates\lib", "C:\Users\me\maple\toolbox\2025\Maple Customer Support Updates\lib", "C:\Program Files\Maple 2025\lib"

> 

restart;
> 

ode:=sin(x)*diff(y(x), x, x) + (2*sin(x) - cos(x))*diff(y(x), x) + (sin(x) - cos(x))*y(x) = exp(-x);

sin(x)*(diff(diff(y(x), x), x))+(2*sin(x)-cos(x))*(diff(y(x), x))+(sin(x)-cos(x))*y(x) = exp(-x)

> 

dsolve(ode)

y(x) = exp(arcsin(cos(x)))*c__2+exp(arcsin(cos(x)))*cos(x)*c__1+exp(arcsin(cos(x)))*(-(Int(csc(x)^2*exp(-arcsin(cos(x))-x), x))*cos(x)+Int(cot(x)*csc(x)*exp(-arcsin(cos(x))-x), x))

> 

dsolve(ode,Lie)

Error, (in dsolve) numeric exception: division by zero

 

 

Download division_by_zero_dsolve_maple_2025_2_on_dec_2_2025.mw

Screen reader Maple on windows 10?...

Asked by: nm 11693
gui windows10
November 30 2025
1  1

I've seen many here recommend using the screen reader for Maple 2025. So this is first time I tried it.

Clicked on this second icon in my windows 10 start menu

Maple came up using the old UI, which is good:

But here comes the big problem. The file->Open menu does not work. It automatically opened in location which is not what I want. I wanted to navigate to different place on my PC. But anything I click on just generates loud beep and does nothing. Can't type anything to change location either.

So can't open any file. Not only that, It is stuck and can't even close the windows. Can't get out. Everything is stuck. 

It could be because I have 2 monitors. I had this open on the second monitor on the right. Everything on the second monitor now do not respond like Maple. Luckily, on the left monitor I was able to start task manager and kill Maple in order to get out of this hang.    

Basically screen reader does not work at all for me. If I can't open a file.

It could be due to using 2 monitors. I do not know.

Does file open work for others?

Here is small movie.

why calling solve crashes?...

Asked by: nm 11693
solve crash
November 28 2025
2  1

Do not know if this is new or not.

I have found about 12 Maple crashes so far in just 2 days running a test in Maple 2025.2

But this one I am not sure if it is new or not as never seen it before.

Could someone please just run this in Maple 2025.1 and see if you get same crash? So I know if it is new or not. Only have Maple 2025.2 on this new PC.

Calling solve causes Maple server to crash. Save your work before just in case.

> 

restart;
> 

interface(version);

`Standard Worksheet Interface, Maple 2025.2, Windows 10, November 11 2025 Build ID 1971053`

> 

Physics:-Version();

`The "Physics Updates" version in the MapleCloud is 1881 and is the same as the version installed in this computer, created 2025, October 7, 16:4 hours Pacific Time.`

> 

SupportTools:-Version();

`The Customer Support Updates version in the MapleCloud is 29 and is the same as the version installed in this computer, created June 23, 2025, 10:25 hours Eastern Time.`

> 

sol:=ln( (y-1)^(1/3)* (y^2+y+1)^(1/3) ) - ln(y) = 2/5* ln(t^2+1)+_C1;

ln((y-1)^(1/3)*(y^2+y+1)^(1/3))-ln(y) = (2/5)*ln(t^2+1)+_C1

> 

infolevel[solve]:=5;

5

> 

solve( sol,y);

Main: Entering solver with 1 equation in 1 variable

Dispatch: dispatching to Radicals handler

Transformer:   solving for linear equation in y

Recurse: recursively solving 1 equations and 4 inequations in 1 variables

Dispatch: dispatching to ln handler (extension)

Dispatch: logarithm substitution _S000002 = ln(_S000001)

Recurse: recursively solving 1 equations and 4 inequations in 1 variables

Dispatch: dispatching to ln handler (extension)

Dispatch: logarithm substitution _S000003 = ln(t^2+1)

Transformer:   solving for linear equation in _S000003

Recurse: recursively solving 1 equations and 3 inequations in 1 variables

Dispatch: dispatching to ln handler (extension)

Dispatch: logarithm substitution _S000004 = ln(exp(_S000002)^3+1)

Recurse: recursively solving 2 equations and 3 inequations in 2 variables

Dispatch: dispatching to ln handler (extension)

Dispatch: logarithm substitution _S000005 = ln(exp(_S000002)^6+3*exp(_S000002)^3+3)

Recurse: recursively solving 3 equations and 3 inequations in 3 variables

Dispatch: dispatching to Exponentials handler

Transformer:   solving for linear equation in _S000005

Recurse: recursively solving 3 equations and 4 inequations in 4 variables

Dispatch: dispatching to Exponentials handler

Transformer:   solving for linear equation in _S000004

Recurse: recursively solving 3 equations and 5 inequations in 5 variables

Dispatch: dispatching to Exponentials handler

Transformer:   solving for linear equation in _S000002

Recurse: recursively solving 3 equations and 6 inequations in 6 variables

Dispatch: dispatching to Rename handler

Dispatch: renaming exp(5/2*_C1) = _S000012, exp(-5/2*_C1) = 1/_S000012

Recurse: recursively solving 3 equations and 6 inequations in 6 variables

Dispatch: handling polynomials of the form a*x^n-b

Dispatch: dispatching to PolynomialSystem handler

Main: polynomial system split into 1 parts under preprocessing

Main: using RegularChains based methods

SolverVariableOrder: using the variable order  _S000008 > _S000006 > _S000010

TriangularDecomposition: using deterministic algorithm for decomposition

Download calling_solve_crashes_maple_2025_2_nov_28_2025.mw

Note that this crash happens even when removing Physics update and SupportTools from libname.

Is this crash new in Maple 2025.2?...

Asked by: nm 11693
ode differential-equations crash
November 26 2025
3  0

I only have Maple 2025.2 on this new PC. Could someone just run this code on earlier Maple version and see if they get same crash?

I am finding many crashes in Maple 2025.2 (3 so far) and I am only 25% in my test.  But not sure if this is new or was there in Maple 2025.1 or earlier. 

I am trying to document all the new problems in Maple 2025.2.

Here is the worksheet (save all your work just in case).

> 

restart;
> 

interface(version);

`Standard Worksheet Interface, Maple 2025.2, Windows 10, November 11 2025 Build ID 1971053`

> 

SupportTools:-Version();

`The Customer Support Updates version in the MapleCloud is 29 and is the same as the version installed in this computer, created June 23, 2025, 10:25 hours Eastern Time.`

> 

Physics:-Version();

`The "Physics Updates" version in the MapleCloud is 1881 and is the same as the version installed in this computer, created 2025, October 7, 16:4 hours Pacific Time.`

> 

ode:=(4+2*x-y(x))*diff(y(x),x)+5+x-2*y(x) = 0;

(4+2*x-y(x))*(diff(y(x), x))+5+x-2*y(x) = 0

> 

sol:=y(x) = ((2*(x+11)*(x+1)^4*exp(12*_C1)-29*(x+103/29)*(x+1)^2*exp(6*_C1)+27*x+81)
*RootOf(2+(exp(6*_C1)*x^2+2*exp(6*_C1)*x+exp(6*_C1)-1)*_Z^6+3*_Z^2)^4+(-2*(x-4)
*(x+1)^4*exp(12*_C1)-34*(x+1)^2*(x+67/17)*exp(6*_C1)+54*x+162)*RootOf(2+(exp(6*
_C1)*x^2+2*exp(6*_C1)*x+exp(6*_C1)-1)*_Z^6+3*_Z^2)^2-(x-1)*(x+1)^4*exp(12*_C1)-\
14*(x+1)^2*(x+29/7)*exp(6*_C1)+27*x+81)/((10*(x+1)^4*exp(12*_C1)+27-37*(x+1)^2*
exp(6*_C1))*RootOf(2+(exp(6*_C1)*x^2+2*exp(6*_C1)*x+exp(6*_C1)-1)*_Z^6+3*_Z^2)^
4+(5*(x+1)^4*exp(12*_C1)+54-50*(x+1)^2*exp(6*_C1))*RootOf(2+(exp(6*_C1)*x^2+2*
exp(6*_C1)*x+exp(6*_C1)-1)*_Z^6+3*_Z^2)^2+(x+1)^4*exp(12*_C1)+27-22*(x+1)^2*exp
(6*_C1));

y(x) = ((2*(x+11)*(x+1)^4*exp(12*_C1)-29*(x+103/29)*(x+1)^2*exp(6*_C1)+27*x+81)*RootOf(2+(exp(6*_C1)*x^2+2*exp(6*_C1)*x+exp(6*_C1)-1)*_Z^6+3*_Z^2)^4+(-2*(x-4)*(x+1)^4*exp(12*_C1)-34*(x+1)^2*(x+67/17)*exp(6*_C1)+54*x+162)*RootOf(2+(exp(6*_C1)*x^2+2*exp(6*_C1)*x+exp(6*_C1)-1)*_Z^6+3*_Z^2)^2-(x-1)*(x+1)^4*exp(12*_C1)-14*(x+1)^2*(x+29/7)*exp(6*_C1)+27*x+81)/((10*(x+1)^4*exp(12*_C1)+27-37*(x+1)^2*exp(6*_C1))*RootOf(2+(exp(6*_C1)*x^2+2*exp(6*_C1)*x+exp(6*_C1)-1)*_Z^6+3*_Z^2)^4+(5*(x+1)^4*exp(12*_C1)+54-50*(x+1)^2*exp(6*_C1))*RootOf(2+(exp(6*_C1)*x^2+2*exp(6*_C1)*x+exp(6*_C1)-1)*_Z^6+3*_Z^2)^2+(x+1)^4*exp(12*_C1)+27-22*(x+1)^2*exp(6*_C1))

> 

infolevel[odetest]:=5;

5

> 

odetest(sol,ode);

odetest: Performing an implicit solution test

odetest: Trying to eliminate constants using the order: [_C1]

odetest: Trying to eliminate _C1

> 

 

 

Download maple_crash_odetest_2025_2_nov_26_2025.mw

Update

Based on comment below, I just checked. If I remove "C:Usersmemaple\toolbox2025Maple Customer Support Updateslib" and "C:Usersmemaple\toolbox2025Physics Updateslib"  from libname, then the crash goes away !

> 

restart;
> 

interface(version);

`Standard Worksheet Interface, Maple 2025.2, Windows 10, November 11 2025 Build ID 1971053`

> 

SupportTools:-Version();

`The Customer Support Updates version in the MapleCloud is 29 and is the same as the version installed in this computer, created June 23, 2025, 10:25 hours Eastern Time.`

> 

Physics:-Version();

`The "Physics Updates" version in the MapleCloud is 1881 and is the same as the version installed in this computer, created 2025, October 7, 16:4 hours Pacific Time.`

> 

libname

"C:\Users\me\maple\toolbox\2025\Physics Updates\lib", "C:\Users\me\maple\toolbox\2025\Maple Customer Support Updates\lib", "C:\Program Files\Maple 2025\lib"

> 

libname:=libname[3];

"C:\Program Files\Maple 2025\lib"

> 

ode:=(4+2*x-y(x))*diff(y(x),x)+5+x-2*y(x) = 0;

(4+2*x-y(x))*(diff(y(x), x))+5+x-2*y(x) = 0

> 

sol:=y(x) = ((2*(x+11)*(x+1)^4*exp(12*_C1)-29*(x+103/29)*(x+1)^2*exp(6*_C1)+27*x+81)
*RootOf(2+(exp(6*_C1)*x^2+2*exp(6*_C1)*x+exp(6*_C1)-1)*_Z^6+3*_Z^2)^4+(-2*(x-4)
*(x+1)^4*exp(12*_C1)-34*(x+1)^2*(x+67/17)*exp(6*_C1)+54*x+162)*RootOf(2+(exp(6*
_C1)*x^2+2*exp(6*_C1)*x+exp(6*_C1)-1)*_Z^6+3*_Z^2)^2-(x-1)*(x+1)^4*exp(12*_C1)-\
14*(x+1)^2*(x+29/7)*exp(6*_C1)+27*x+81)/((10*(x+1)^4*exp(12*_C1)+27-37*(x+1)^2*
exp(6*_C1))*RootOf(2+(exp(6*_C1)*x^2+2*exp(6*_C1)*x+exp(6*_C1)-1)*_Z^6+3*_Z^2)^
4+(5*(x+1)^4*exp(12*_C1)+54-50*(x+1)^2*exp(6*_C1))*RootOf(2+(exp(6*_C1)*x^2+2*
exp(6*_C1)*x+exp(6*_C1)-1)*_Z^6+3*_Z^2)^2+(x+1)^4*exp(12*_C1)+27-22*(x+1)^2*exp
(6*_C1));

y(x) = ((2*(x+11)*(x+1)^4*exp(12*_C1)-29*(x+103/29)*(x+1)^2*exp(6*_C1)+27*x+81)*RootOf(2+(exp(6*_C1)*x^2+2*exp(6*_C1)*x+exp(6*_C1)-1)*_Z^6+3*_Z^2)^4+(-2*(x-4)*(x+1)^4*exp(12*_C1)-34*(x+1)^2*(x+67/17)*exp(6*_C1)+54*x+162)*RootOf(2+(exp(6*_C1)*x^2+2*exp(6*_C1)*x+exp(6*_C1)-1)*_Z^6+3*_Z^2)^2-(x-1)*(x+1)^4*exp(12*_C1)-14*(x+1)^2*(x+29/7)*exp(6*_C1)+27*x+81)/((10*(x+1)^4*exp(12*_C1)+27-37*(x+1)^2*exp(6*_C1))*RootOf(2+(exp(6*_C1)*x^2+2*exp(6*_C1)*x+exp(6*_C1)-1)*_Z^6+3*_Z^2)^4+(5*(x+1)^4*exp(12*_C1)+54-50*(x+1)^2*exp(6*_C1))*RootOf(2+(exp(6*_C1)*x^2+2*exp(6*_C1)*x+exp(6*_C1)-1)*_Z^6+3*_Z^2)^2+(x+1)^4*exp(12*_C1)+27-22*(x+1)^2*exp(6*_C1))

> 

infolevel[odetest]:=5;

5

> 

odetest(sol,ode);

odetest: Performing an implicit solution test

odetest: Trying to eliminate constants using the order: [_C1]

odetest: Trying to eliminate _C1

odetest: Successful elimination of c__1

odetest: length of implicit solutions after isolating _Cn constants: 164

odetest: length after collecting objects and simplifying coefficients: 126

odetest: length after Solve w.r.t yn: 66

odetest: length after collect @ normal @ eval the ODE at the implicit solution: 0

Successful implicit test

0

> 

 

 

Download maple_crash_odetest_2025_2_nov_26_2025_V2.mw

I also checked if libname had PHYSICS on it but no SUPPORT tools, and the crash also goes away. So the bug seems to be when adding SUPPORT tools. 


 

> 

restart;
> 

interface(version);

`Standard Worksheet Interface, Maple 2025.2, Windows 10, November 11 2025 Build ID 1971053`

> 

SupportTools:-Version();

`The Customer Support Updates version in the MapleCloud is 29 and is the same as the version installed in this computer, created June 23, 2025, 10:25 hours Eastern Time.`

> 

Physics:-Version();

`The "Physics Updates" version in the MapleCloud is 1881 and is the same as the version installed in this computer, created 2025, October 7, 16:4 hours Pacific Time.`

> 

libname

"C:\Users\me\maple\toolbox\2025\Physics Updates\lib", "C:\Users\me\maple\toolbox\2025\Maple Customer Support Updates\lib", "C:\Program Files\Maple 2025\lib"

> 

libname:=libname[1],libname[3]

"C:\Users\me\maple\toolbox\2025\Physics Updates\lib", "C:\Program Files\Maple 2025\lib"

> 

libname