This book is about modeling and simulation of physical systems. The following
diagram shows what I mean by “modeling”.
Starting in the lower left, the system is something in the real world we are
interested in. Often,it is something complicated, so we have to decide which
details can be simplified or abstracted away.
The result of abstraction is a model that includes the features we think are
essential. A model can be represented in the form of diagrams and equations,
which can be used format hematical analysis. It can also be implemented in
the form of a computer program, which can run simulations