-----maxima-bounces at math.utexas.edu wrote: -----
>There?is?another?potential?problem,?the?plot?produced?has?a?"glitch"
>around
80?(horizontal?axis).?I?certainly?get?that?here,?even?computing?with
>bfloats.?My?colleague?has?just?sent?me?the?graphs?computed?with?maxima?and
I saw the glitch too. Did you compare the numerical values near 80? There
is a tiny(!)
chance that the glitch is due to gnuplot, not in the data. I'd guess there
is a
greater chance that the stopping criteria for eigens_by_jacobi is subideal.
Also, I think Maxima has alternative numerical eigenvalue code (translated
from
fortran). Maybe you could try that code to see if the glitch vanishes.
Barton