Mathematics can be viewed as the philosophy of abstract objects. Indeed,
mathematics studies all sorts of useful objects, from numbers to multilevel
hierarchies and more general sets, along with the relations and functions associated
with them.
The approach used in this book is to focus on the objects, rather than on the
functions that use them. After all, the objects are the main building bricks of
the language of mathematics. The C++ implementation of the objects makes
them far more understandable and easy to comprehend.