13.2 Changing Variables

Often to solve a problem one must change variables. Our belief is that for system engineering problems the changes of variables are fairly simple.

The nature of a simple effective class of changes of variables is explained in [HS99] and sketched in Chapter 31 The NCProcess output prompts for changes of variables if NCCOV True by placing parentheses in carefully selected places. The experimental commands described in §31 actually automates this change of variable business to some extent.