Note that is a function of only because, although appears on the right hand side, is uniquely determined by through (2.1). We show in the appendix (Section 16.4) that indeed is a PDF (integrates to 1), and is a member of . The term

is called the ``J-function" because of the analog with the Jacobian in the change of variables theorem[6]. The projected PDF is therefore decomposed into two terms,

Baggenstoss 2017-05-19