>
> Methods can be chosen with -ts_ssp_type {rks2,rks3,rk104}
>
> rks2: Second order methods with any number s>1 of stages. c_eff = (s-1)/s
>
> rks3: Third order methods with s=n^2 stages, n>1. c_eff = (s-n)/s
>
> rk104: A 10-stage fourth order method. c_eff = 0.6
>This means that there there are only three options for -ts_ssp_type. Namely, -ts_ssp_type rks2 -ts_ssp_type rks3 -ts_ssp_type rk104 > However, when I write > > -ts_ssp_type rk53 > Therefore, this is not even close to being valid. What are you trying to do? Get 5 work stages? You can see other ssp options with the -h option (probably helps to pipe the output to 'grep'), ./program -ts_type ssp -h | grep ssp -ts_type <beuler>: TS method (one of) euler beuler cn pseudo gl ssp theta alpha -ts_ssp_type <rk104>: Type of SSP method (one of) rks2 rks3 rk104 (TSSSPSetType) -ts_ssp_nstages <5>: Number of stages (TSSSPSetNumStages) So, you would probably want the following options, ./program -ts_type ssp -ts_ssp_type rks3 -ts_ssp_nstages 5 but keep in mind that 5 is the default for -ts_ssp_nstages. Hope that helps. Sean -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20110718/e8ecdecd/attachment.htm>
