[petsc-dev] alternative computation of overlap in additive Schwarz

[Barry Smith]

 Daniel Szyld suggests a refined way of computing overlap for additive Schwarz. Instead of taking all rows/columns connected to the block take those with "strong" coupling.  I think this could be easily added to PETSc. 
The paper is at his website: http://math.temple.edu/szyld

 I've also added this to the projects file.


  Barry

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