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Question: bug report (Maple 2024). Adding Physics:-Setup(assumingusesAssume = true): generate internal exception using odetest

Question:bug report (Maple 2024). Adding Physics:-Setup(assumingusesAssume = true): generate internal exception using odetest

nm 11353 Maple 2025
assuming odetest physics
March 25 2025
0

Does this happen in Maple 2025?

Why when adding Physics:-Setup(assumingusesAssume = true): now Maple gives internal exception which can not even be cought?

> 

interface(version);

`Standard Worksheet Interface, Maple 2024.2, Windows 10, October 29 2024 Build ID 1872373`

> 

Physics:-Version();

`The "Physics Updates" version in the MapleCloud is 1849 and is the same as the version installed in this computer, created 2025, March 12, 12:37 hours Pacific Time.`

> 

restart;
> 

ode:=diff(y(x),x) = (ln(y(x))^2+2*_C1)^(1/2)*y(x);
sol:=y(x) = exp((-2*_C1)^(1/2))

diff(y(x), x) = (ln(y(x))^2+2*_C1)^(1/2)*y(x)

y(x) = exp((-2*_C1)^(1/2))

> 

odetest(sol,ode) assuming positive;

-(ln(exp(I*2^(1/2)*_C1^(1/2)))^2+2*_C1)^(1/2)*exp(I*2^(1/2)*_C1^(1/2))

> 

restart;
> 

ode:=diff(y(x),x) = (ln(y(x))^2+2*_C1)^(1/2)*y(x);
sol:=y(x) = exp((-2*_C1)^(1/2)) ;

diff(y(x), x) = (ln(y(x))^2+2*_C1)^(1/2)*y(x)

y(x) = exp((-2*_C1)^(1/2))

> 

Physics:-Setup(assumingusesAssume = true):
> 

odetest(sol,ode) assuming positive;

Error, (in type/evalc/cx) too many levels of recursion

> 

restart;
> 

ode:=diff(y(x),x) = (ln(y(x))^2+2*_C1)^(1/2)*y(x);
sol:=y(x) = exp((-2*_C1)^(1/2)) ;

diff(y(x), x) = (ln(y(x))^2+2*_C1)^(1/2)*y(x)

y(x) = exp((-2*_C1)^(1/2))

> 

Physics:-Setup(assumingusesAssume = false):
> 

odetest(sol,ode) assuming positive;

-(ln(exp(I*2^(1/2)*_C1^(1/2)))^2+2*_C1)^(1/2)*exp(I*2^(1/2)*_C1^(1/2))

 

 

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