Probably very obvious, but you never know: Did you try LAPACK from labs?
While running I noticed: load 'math/lapack' load 'math/lapack/geev' examples with eigenvalues and vectors docs_jlapack_ '' NB. display list of lap files ┌──────────┬──────────┬──────────┬──────────┬──────────┬ │dlahqr.lap│zlaev2.lap│dlaed5.lap│ztgsja.lap│dgecon.lap│ └──────────┴──────────┴──────────┴──────────┴──────────┴ On 05-10-13 15:13, Raul Miller wrote:
This is definitely a fun exercise, and I'm having fun playing with it (mostly looking at intermediate results and a few variations on the theme). That said, what I was really looking for was documentation or explorations on J's facilities (such as mt or lapack) for working with eigenvalues (and eigenvectors - in principle if you have the one the other is straightforward). Here, though, you did not use mt, nor did you use lapack. You started with a specific set of eigenvalues and demonstrated a context where you could plug them in. And I certainly appreciate the effort - and it does demonstrate some of the identities involving their use - but of course I am looking for more! Thanks,
-- Met vriendelijke groet, @@i = Arie Groeneveld ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
