Pivots (Gaussian reduction)
06-13-2015, 02:56 PM (This post was last modified: 06-13-2015 03:07 PM by salvomic.)
Post: #14
 salvomic Senior Member Posts: 1,396 Joined: Jan 2015
RE: Pivots (Gaussian reduction)
(06-09-2015 12:50 PM)salvomic Wrote:  EDIT June 12 2015: every new version will be put in this thread of the Software Library of the Forum

I need, however two hint (help, advice):
1. the program as is works (sure it could have other bugs, however...), but only if matrix is squared (rxr) or r<c, thank in most range of the cases, but not if r>c (I know that in this case there will be one or more rows dependent, too many equations than variables), but in some cases it is stil important to get elimination.
A first hypothesis should be to add one or more columns with 0 than calculates Pivots() or LU_ext(), eliminate the columns with 0... but this is an arbitrary decision...

2. also elimination (reduction) for columns (instead of for rows) is used, sometimes: for now the program doesn't make it.
I've only a confuse idea how to revert algorithm for this purpose, in simply way...

Thank you
Salvo

∫aL√0mic (IT9CLU) :: HP Prime 50g 41CX 71b 42s 39s 35s 12C 15C - DM42, DM41X - WP34s Prime Soft. Lib
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 Messages In This Thread Pivots (Gaussian reduction) - salvomic - 06-03-2015, 01:20 PM RE: Pivots (Gaussian elimination) - salvomic - 06-05-2015, 05:06 PM RE: Pivots (Gaussian elimination) - DrD - 06-05-2015, 07:03 PM RE: Pivots (Gaussian elimination) - salvomic - 06-05-2015, 07:29 PM RE: Pivots (Gaussian reduction) - salvomic - 06-06-2015, 09:41 PM RE: Pivots (Gaussian reduction) - DrD - 06-07-2015, 10:42 AM RE: Pivots (Gaussian reduction) - salvomic - 06-07-2015, 11:28 AM RE: Pivots (Gaussian reduction) - DrD - 06-07-2015, 12:13 PM RE: Pivots (Gaussian reduction) - salvomic - 06-07-2015, 12:41 PM RE: Pivots (Gaussian reduction) - salvomic - 06-08-2015, 04:02 PM RE: Pivots (Gaussian reduction) - salvomic - 06-08-2015, 10:15 PM RE: Pivots (Gaussian reduction) - DrD - 06-09-2015, 10:55 AM RE: Pivots (Gaussian reduction) - salvomic - 06-09-2015, 12:50 PM RE: Pivots (Gaussian reduction) - salvomic - 06-13-2015 02:56 PM

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