I Specific Examples In this section, specific examples of parallel algorithms that implement message passing are given The first two examples consider simple collective communication calls to parallelize matrix-vector and matrix-matrix multiplication These calls are meant to be illustrative, because parallel numerical libraries usually provide the most efficient algorithms for these operations. See Chapter 10 Parallel Mathematical Libraries. The third example shows how you can use ghost cells to construct a parallel data approach to solve Poisson's equation The fourth example revisits matrix-vector multiplication, but from a client server approachSpecific Examples • In this section, specific examples of parallel algorithms that implement message passing are given. • The first two examples consider simple collective communication calls to parallelize matrix-vector and matrix-matrix multiplication. • These calls are meant to be illustrative, because parallel numerical libraries usually provide the most efficient algorithms for these operations. (See Chapter 10 - Parallel Mathematical Libraries.) • The third example shows how you can use ghost cells to construct a parallel data approach to solve Poisson's equation. • The fourth example revisits matrix-vector multiplication, but from a client server approach