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# Getting Started with ScaLAPACK

This chapter provides the background information to enable users to call ScaLAPACK software, together with a simple example program. The chapter begins by presenting a set of instructions to execute a ScaLAPACK example program, followed by the source code of Example Program #1. A detailed explanation of the example program is given, and finally the necessary steps to call a ScaLAPACK routine are described by referencing the example program.

For an explanation of the terminology used within this chapter, please refer to the List of Notation and/or Glossary at the beginning of this book.

- How to Run an Example Program Using MPI
- Source Code for Example Program #1
- Details of Example Program #1
  - Simplifying Assumptions Used in Example Program
  - Notation Used in Example Program
  - Output of Example Program #1 Using MPI
  - Output of Example Program #1 Using PVM
- Four Basic Steps Required to Call a ScaLAPACK Routine
  - Initialize the Process Grid
  - Distribute the Matrix on the Process Grid
  - Call the ScaLAPACK Routine
  - Release the Process Grid