Thanks Jose, I like this change.
Fande On Mon, Oct 23, 2017 at 10:03 AM, Matthew Knepley <[email protected]> wrote: > On Mon, Oct 23, 2017 at 11:18 AM, Jose E. Roman <[email protected]> > wrote: > >> Changed. Hope it is clear now. >> https://bitbucket.org/slepc/slepc/commits/511900656a27a161c1 >> df6fe2e42fd8d66d071800 > > > Great, that is much clearer. > > Thanks, > > Matt > > >> >> Jose >> >> > El 21 oct 2017, a las 14:27, Matthew Knepley <[email protected]> >> escribió: >> > >> > On Sat, Oct 21, 2017 at 2:20 AM, Jose E. Roman <[email protected]> >> wrote: >> > This was added in 3.8 to check the common case when people incorrectly >> sets shift-and-invert with EPS_SMALLEST_MAGNITUDE. To compute smallest >> eigenvalues with shift-and-invert the correct way is to set target=0 and >> which=EPS_TARGET_MAGNITUDE. See for instance >> > http://slepc.upv.es/documentation/current/src/eps/examples/ >> tutorials/ex13.c.html >> > >> > Jose, one thing we are trying to do in PETSc now is to give the options >> to fix a problem (or at least representative options) >> > directly in the error message. Or maybe a pointer to the relevant >> manual or tutorial section. This gives users a hand up. >> > >> > Thanks, >> > >> > Matt >> > >> > >> > Jose >> > >> > >> > > El 21 oct 2017, a las 1:51, Matthew Knepley <[email protected]> >> escribió: >> > > >> > > On Fri, Oct 20, 2017 at 7:43 PM, Kong, Fande <[email protected]> >> wrote: >> > > Hi All, >> > > >> > > I am trying to solve a generalized eigenvalue problem (using SLEPc) >> with "-eps_type krylovschur -st_type sinvert". I got an error message: >> "Must select a target sorting criterion if using shift-and-invert". >> > > >> > > Not sure how to proceed. I do not quite understand this sentence. >> > > >> > > You need to know how to choose the shift. So for instance you want >> the smallest eigenvalues, or the closest to zero, etc. >> > > I don't know the options, but they are in the manual. >> > > >> > > Matt >> > > >> > > >> > > Fande, >> > > >> > > >> > > >> > > -- >> > > 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/ >> > >> > >> > >> > >> > -- >> > 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/ >> >> > > > -- > 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.caam.rice.edu/~mk51/> >
