"Version: 20181201"--Title page verso.Includes bibliographical references.1. What is computational astrophysics? -- 1.1. Computational astrophysics -- 1.2. A brief history of simulations in astrophysics -- 1.3. Software used in this book -- 1.4. Initial conditions2. Gravitational dynamics -- 2.1. In a nutshell -- 2.2. N-body integration strategies -- 2.3. Gravity solvers in AMUSE -- 2.4. Exampl…