OGS
[tag] reltol

The relative tolerance being applied to the norm of the whole residuum vector.

The relative error $$e$$ is computed as

$e = \frac{||r||}{||r_0||+\epsilon},$

where $$r$$ and $$r_0$$ are the residuum and the residuum from computed in the first iteration, respectively, and $$\epsilon$$ is the machine epsilon guaranteeing that the denominator is always nonzero.

• Data type: double