\def\addm {(5.1)} \def\naive {(5.2)} \def\backc {(5.3)} \def\backe {(5.4)} \def\backd {(5.5)} \def\backdd {(5.6)} \def\qb {(5.7)} \def\nqd {(5.8)} \def\css {(5.9)} \def\newm {(5.10)} \def\splinpen {(5.11)} \def\nsplinpen {(5.12)} \def\solsplin {(5.13)} \def\gsplinpen {(5.14)} \def\rkcrit {(5.15)} \def\rksoln {(5.16)} \def\rkdata {(5.17)} \def\backrk {(5.18)} \def\resv {(5.19)} \def\splitup {(5.20)} \def\simmm {(5.21)} \def\back {(5.22)} \def\backit {(5.23)} \def\qbac {(5.24)} \def\qconv {(5.25)} \def\qconvsum {(5.26)} \def\wsplinpen {(5.27)} \def\mbsol {(5.28)} \def\nuu {(5.29)} \def\bogplus {(5.30)} \def\bayesadd {(5.31)} \def\twicing {(5.32)}