It is documented in the manual page for SNESConvergedDefault
> On Sep 29, 2020, at 12:41 PM, Matthew Knepley <[email protected]> wrote: > > On Tue, Sep 29, 2020 at 9:21 AM Oliver Zacharias <[email protected] > <mailto:[email protected]>> wrote: > Dear Sir or Madam, > > regarding your SNES-Tool one can specifiy at least three types of > accuracy which force the code to terminate. I would like know how you > have defined (and implemented) the following quantities: > > a) "rtol" > > This means a relative tolerance, or bound on ||F(x_n)||/||F(x_0)|| > > b) "abstol" > > This mean an absolute tolerance, or a bound on ||F(x_n)|| > > Thanks, > > Matt > > The definition of the quantity "stol" is already described on one of > your manual pages. Would you also like to present a cite where to find > those definitions? > Thanks in advance, > Oliver Zacharias > > > > -- > What most experimenters take for granted before they begin their experiments > is infinitely more interesting than any results to which their experiments > lead. > -- Norbert Wiener > > https://www.cse.buffalo.edu/~knepley/ <http://www.cse.buffalo.edu/~knepley/>
