() shows that the Hessians in equations ()
can be unstable if the signal and noise operators 380#380 and 381#381predict similar components of the data space.
In this section I show that the Spitz estimate of the signal
PEF makes this overlap impossible.
![[*]](http://sepwww.stanford.edu/latex2html/cross_ref_motif.gif)
)
can be unstable if the signal and noise operators 380#380 and 381#381predict similar components of the data space.
In this section I show that the Spitz estimate of the signal
PEF makes this overlap impossible.