differentialequations

https://arxiv.org/abs/2012.06684

@samuela is there code to share that could become a tutorial? I think it would be good to make one.

there need more results of predictions for a system of PDE and compare with reliable results.

http://eqworld.ipmnet.ru/en/solutions/syspde.htm

• vcat of two ComponentVectors where they share any of the same component names should become a plain Array
• Need cat defined
• Faster cats, if possible

Currently, values for the llh, gradient, the computed trajectories of states and observables, or the sensitivities are checked in unit tests.
Unfortunately, some bugs, such as incorrect Jacobians or switched minus signs in the Newton solver, will not necessarily affect those quantities. However, they will substantially impact solver performance, by causing way too many steps to be taken. Hence, w