Forward differentiation methods
FEULER
Integrator file: int/feuler.f90
Forward Euler is an explicit integration method for non-stiff problems. FEULER computes \(y^{n+1}\) as
\[\begin{aligned}
y^{n+1} = y^n + hf\left(t^{n},y^{n}\right)
\end{aligned}\]