Reference documentation for deal.II version 9.4.1

#include <deal.II/lac/petsc_sparse_matrix.h>
Static Public Attributes  
static const bool  zero_addition_can_be_elided = true 
A structure that describes some of the traits of this class in terms of its runtime behavior. Some other classes (such as the block matrix classes) that take one or other of the matrix classes as its template parameters can tune their behavior based on the variables in this class.
Definition at line 61 of file petsc_sparse_matrix.h.

static 
It is safe to elide additions of zeros to individual elements of this matrix.
Definition at line 67 of file petsc_sparse_matrix.h.