Code for Rank Revealing QR Factorizations

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2 total messages Started by C.R. Katholi Thu, 12 Nov 1992 21:56

#773

Author: C.R. Katholi
Date: Thu, 12 Nov 1992 21:56

6 lines
796 bytes

     I think that I saw a notice somewhere not too long ago concerning
an implementation of the rank revealing QR factorization described by
T. Chan, "Rank Revealing QR Factorizations", Linear Algebra and Its
Applications, (1987). Can anyone point me to a place where I can obtain this
code, preferably by ftp. Please send responses to   katholi@cis.uab.edu.
     Thank you in advance for your help.

Re: Code for Rank Revealing QR Factorizations

#778

Author: G. W. Stewart
Date: Fri, 13 Nov 1992 08:24

18 lines
1488 bytes

In article <1992Nov12.215633.8030@cis.uab.edu> katholi@willis.cis.uab.edu (C.R. Katholi) writes:
>
>     I think that I saw a notice somewhere not too long ago concerning
>an implementation of the rank revealing QR factorization described by
>T. Chan, "Rank Revealing QR Factorizations", Linear Algebra and Its
>Applications, (1987). Can anyone point me to a place where I can obtain this
>code, preferably by ftp. Please send responses to   katholi@cis.uab.edu.
>     Thank you in advance for your help. 

There have been developments since Tony published his RRQR factorization.
I have written a survey "Determining Rank in the Presence of Error,"
which can be obtained by anonymous ftp at thales.cs.umd.edu in
pub/reports.  The file is drpe.dvi (remember to transfer in the binary
mode).  Experimental FORTRAN code for a RRURV decomposition can be
found in uast.f.  You also might want to try browsing through the
Abstracts or Contents file for related reports.

Pete Stewart

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