Example 7.4.2(c): Simple Functions

How does the Dirichlet function fit in with this terminology?
Context Context
Recall the definition of the Dirichlet function:
In our new terminology, let Q be the set of all rational numbers. Then the Dirichlet function is simply the characteristic function of Q, i.e.
g(x) = XQ(x)

Interactive Real Analysis, ver. 1.9.5
(c) 1994-2007, Bert G. Wachsmuth
Page last modified: Mar 28, 2007