OGS
[tag] reltol

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

The relative error $$e$$ is computed as

$e = \frac{||\Delta x||}{||x||+\epsilon},$

where $$\Delta x$$ and $$x$$ are the current solution update and the new solution from the current iteration, respectively, and $$\epsilon$$ is the machine epsilon guaranteeing that the denominator is always nonzero.

• Data type: double