[petsc-users] Structure of DMMG

[Alan Wei]

Dear Barry,
   You really answer what I want to know. Thank you so much and sorry for my
knowledge lacking of programming.
   I will go through those tutorial examples.
   You are really nice.

thanks,
Alan

On Wed, Aug 24, 2011 at 4:25 PM, Barry Smith <bsmith at mcs.anl.gov> wrote:

>
>  Alan,
>
>    PETSc is designed as an object oriented package; as such the objects are
> defined by the operations they perform, not the data stored inside them. So,
> for example, the Vec object is defined by all the VecXXX() operations you
> can call which are listed in the manual pages list.  You really don't want
> to see the details of the Vec data structure (for one thing it is different
> for different Vec implementations), they don't tell you what you can do with
> a Vec. (same of other objects). I suggest going through some of the examples
> and seeing the types of operations you can perform on different objects
> starting with the vec/vec/examples/tutorials examples.
>
>  Barry
>
>
>
> On Aug 24, 2011, at 4:19 PM, Alan Wei wrote:
>
> > Dear all,
> >     I  hope you're having a nice day.
> >     I'm using PETSc as a beginner. I found it is very easy to find a
> definition of a function like 'DACreate2d' online and it explains very
> clearly. However, I think it is really confusing for those explanation of
> data structures like DMMG, DA, DM and so on, or even Vec. I wonder if there
> is more details that I can read, like what is inside DMMG. For example, as I
> see, DM is a part of DMMG.
> >
> > thanks,
> > Alan
>
>
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