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.

# Additional info

## From NumLib/ODESolver/ConvergenceCriterionDeltaX.cpp line 70

• This is an optional parameter.
• Data type: double
• Expanded tag path: time_loop.processes.process.convergence_criterion.DeltaX.reltol
• Go to source code: → ogs/ogs/master