ABSTRACT
This makes only a minor difference in the formalism.) But now we see that different retrieval vectors rj will produce different amounts
of noise in . Unfortunately, using the vector rj that minimizes sj will maximize
?f 2. (I will return to this presently; just take it on faith for the moment.) Choosing a
different rj that reduces ?f 2 will increase sj. Since they represent different physical
quantities, there is no single best way to choose rj. There is no single quantity that we can minimize to arrive at an optimal solution. However, we can parameterize the problem and examine a family of solutions.
