fyi: update to Partial differential equations tests. Maple 2020 and Mathematica 12.1

[Nasser M. Abbasi]

fyi:

Rebuild collection of PDE's for updated versions of CAS systems Maple and Mathematica.

https://www.12000.org/my_notes/pde_in_CAS/pde_in_cas.htm

Currently there are 2,013 PDE's in the test suite.

The following is % solved for each CAS.

===========================
Mathematica V12.1 71.98%
Maple 2020 89.27%

Mathematica V12 65.47%
Maple 2019.2 89.22%

Mathematica V11.3 53.68%
Maple 2018.2 87.92%
============================

--Nasser

[Dr Huang]

some pde have simple solution but both mma and maple only give very complicated solution, which is very hard to test. e.g. problem number 168.

one click the dsolve button to solve it and then one click the test button to test the solution in mathHand.com

http://server.drhuang.com/input/?guess=dsolve%28ds%28y%2Ct%29%3D0.1+*ds%28y%2Cx%2C2%29%2By%29&inp=ds%28y%2Ct%29%3D0.1+*ds%28y%2Cx%2C2%29%2By&lang=null