MatNullSpace Object: 1 MPI process
  type not yet set
  Contains 2 vectors
  Vec Object: 1 MPI process
    type: seq
  0.5
  0.5
  0.5
  0.5
  Vec Object: 1 MPI process
    type: seq
  -0.5
  0.5
  -0.5
  0.5