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Question: Error, (in trig/reduce) too many levels of recursion in DEtools:-symgen(ode)

Question:Error, (in trig/reduce) too many levels of recursion in DEtools:-symgen(ode)

nm 11198 Maple 2023
detools differential-equations recursion symgen
December 20 2023
2

This could be new bug in 2023.2.1, could someone else confirm if it is in earlier versions 2023.2 ?

restart;
ode:=diff(y(x),x)-y(x)^2-m*y(x)*cot(x)-b^2*sin(x)^(2*m) = 0;
DEtools:-symgen(ode)

Error, (in trig/reduce) too many levels of recursion

After about 30 seconds.

I tried it in Maple 2022.2  I waited for more than 10 minutes and it was still running.  If you think it is new bug, will send email to Maple support.

The big problem with these Maple internal errors, is that it is not possible to trap them with try/catch. So the program simply crashes and there is no workaround.

``

> 

restart;

35880

> 

interface(version)

`Standard Worksheet Interface, Maple 2023.2, Windows 10, November 24 2023 Build ID 1762575`

> 

Physics:-Version()

`The "Physics Updates" version in the MapleCloud is 1615 and is the same as the version installed in this computer, created 2023, November 29, 17:28 hours Pacific Time.`

> 

ode:=diff(y(x),x)-y(x)^2-m*y(x)*cot(x)-b^2*sin(x)^(2*m) = 0;

diff(y(x), x)-y(x)^2-m*y(x)*cot(x)-b^2*sin(x)^(2*m) = 0

> 

DEtools:-symgen(ode);

Error, (in tools/map) too many levels of recursion

> 

 


reported to Maple support

Download trig_reduce_recursion_dec_20_2023.mw
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