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- Path: sparky!uunet!think.com!spool.mu.edu!sdd.hp.com!ux1.cso.uiuc.edu!news.cso.uiuc.edu!dan
- From: mcintosh@ccwf.cc.utexas.edu (aubrey mcintosh)
- Subject: Eigenvectors by orthogonalization of columns.
- Message-ID: <85959@ut-emx.uucp>
- Posted-Date: 30 Dec 92 19:36:14 GMT
- Originator: dan@symcom.math.uiuc.edu
- Sender: Daniel Grayson <dan@math.uiuc.edu>
- Followup-To: sci.math.num-analysis
- X-Submissions-To: sci-math-research@uiuc.edu
- Organization: University of Texas, Chemistry
- X-Administrivia-To: sci-math-research-request@uiuc.edu
- Approved: Daniel Grayson <dan@math.uiuc.edu>
- Date: Wed, 30 Dec 1992 19:36:14 GMT
- Lines: 35
-
-
- In "Computational Methods of Linear Algebra," by D.K. Faddeev and
- V.N. Faddeeva, translated by Robert C. Williams, W. H. Freeman and
- Company, original publication date 1960, some methods for
- eigenvalue/eigenvector calculations are given. In particular, the
- method of minimal iterations is given, along with a method of
- orthogonalization of columns method. I want to pursue the
- calculation of eigenvectors from the orthogonalization of columns
- method, but I haven't worked out the polynomials that would
- correspond to this.
-
- A similar orthogonalization of rows method is cited as Johann
- Schroeder, Arch. Math., 1953, 4, 322-326. My German isn't fluent,
- but I think this article should have cited with an earlier chapter.
- I remain unenlightened after viewing it.
-
- Many of the references in this book are in the mid to late 50's,
- e.g. this was an active area of research at publication time. One
- name that I recognized was J.L.Synge. So I presume that more work
- is being done.
-
- I'm wondering if there is more recent literature that someone could
- refer me to, or if someone has the polynomials worked out. I'm
- somewhat excited about this, because the initial orthogonalization
- with pivoting has yielded essentially the correct eigenvalue and
- eigenvector spectrum of a 108x108 correlation matrix from some of my
- lab data, with only a trivial amount of computation time. Although I
- could code an iterative method today to refine these initial values,
- I would like to investigate an exact method.
-
- I'm looking for real-time with a 650x650 on a PC box...
- --
- Aubrey McIntosh / Chemistry / University of Texas / Austin, TX 78712
- ..another Gaelic learner...
-
-