[petsc-dev] SNESCOMPOSITE with a VI underneath

[Patrick Farrell]

Dear Barry et al,

Thanks for that.

I've started a pull request for supporting VIs in SNESCOMPOSITE:

https://bitbucket.org/petsc/petsc/pull-request/306/make-snescomposite-support-vis/diff

This is mainly to start the discussion. In particular,

(a) Do you want me to add a check to every SNESSolve_* that doesn't support bounds
     that no bounds are present?

(b) Is there a writeup of what additiveoptimal actually does? I looked in the manual
     and in the SIAM Review paper and couldn't see a description anywhere. I think
     the coefficients in the least-squares problem need to be modified in light of the
     VI, but I'm not sure how.

Cheerio,

Patrick