[petsc-users] A number of questions about DMDA with SNES and Quasi-Newton methods

[Smith, Barry F.]

> On Oct 31, 2017, at 10:26 AM, zakaryah . <zakaryah at gmail.com> wrote:
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> OK Barry, I'll have a look - thanks.  Should I use DMShellSetCreateMatrix to set the routine I write for matrix allocation?

  What do you do now and how do you create/set the matrix? Are you creating one big old matrix that has all rows and columns, both the special one and the rest or something else?

   Barry

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