# Question:Maple 2024 does not solve some ode's vs. 2023

## Question:Maple 2024 does not solve some ode's vs. 2023

Maple 2024

I was wondering if this is by design or not. Here is one example., This ode is solved by Maple 2023.2.1 on windows 10. The solution is in terms of DESol though. It takes less than one minute.

In Maple 2024 on same PC, dsolve hangs on it.

If this by design? Since DESol solution is not very useful actually. I was thinking that may be Maple is now trying to return a solution without DESol in it, and that is why it hangs or take long time. I stopped it after 5 minutes.

Or should I report it to Maplesoft as possible bug?

Below are 2 worksheets. One using Maple 2023 and one using 2024.

 > interface(version);

 > Physics:-Version();

 > ode:=(x + 1)*diff(u(x), x, x)/((x - 1)*cosh(1/(x - 1))) - (1/((x - 1)*cosh(1/(x - 1))) - (x + 1)/((x - 1)^2*cosh(1/(x - 1))) + (x + 1)*sinh(1/(x - 1))/((x - 1)^3*cosh(1/(x - 1))^2) + (-2*x^3 - 2*x^2)*(x + 1)/((x - 1)^2*cosh(1/(x - 1))^2))*diff(u(x), x) + (x + 1)^2*(x^5 + x^4 + 2*x^2*cosh(1/(x - 1)) - 2*x*cosh(1/(x - 1)) - x - 1)*u(x)/((x - 1)^3*cosh(1/(x - 1))^3);

 > DEtools:-odeadvisor(ode);

 > dsolve(ode); #after about 1 minute...

Download dsolve_march_7_2024_maple_2023.mw

 > restart;
 > interface(version);

 > ode:=(x + 1)*diff(u(x), x, x)/((x - 1)*cosh(1/(x - 1))) - (1/((x - 1)*cosh(1/(x - 1))) - (x + 1)/((x - 1)^2*cosh(1/(x - 1))) + (x + 1)*sinh(1/(x - 1))/((x - 1)^3*cosh(1/(x - 1))^2) + (-2*x^3 - 2*x^2)*(x + 1)/((x - 1)^2*cosh(1/(x - 1))^2))*diff(u(x), x) + (x + 1)^2*(x^5 + x^4 + 2*x^2*cosh(1/(x - 1)) - 2*x*cosh(1/(x - 1)) - x - 1)*u(x)/((x - 1)^3*cosh(1/(x - 1))^3);

 > DEtools:-odeadvisor(ode);

 > dsolve(ode); #hangs

Download dsolve_march_7_2024_maple_2024.mw

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