itaps-parallel Neighbor definition

[Jason Kraftcheck]

Onkar Sahni wrote:
>> Def: for a given part, a part neighbor of dimension d is any other part
>> which shares mesh entities of dimension d with that part (i.e. the
>> entity is represented on both parts).
> 
>   I do not understand what is "a part neighbor of dimension d"? A part
> neighbor is another part so 'd' is dimension of part.
> 

I think neighbors 'of' dimension d are neighbors that share mesh entities
of at most dimension d.  For example, neighbors 'of' dimension 1 are
neighbors that share only edges and vertices.

- jason