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Matrix Inversion ANA
06-16-2016, 11:20 AM
Post: #12
RE: Matrix Inversion ANA
(06-16-2016 11:06 AM)Werner Wrote:  In the 15C they are encoded in the pivots (A(i,i), I mean) - in the exponent sign, I seem to remember. Read it once, somewhere.

The pivots can't go in the diagonal of the decomposed matrix. The U part of the LU decomposition uses the diagonal elements. The L part has 1's down its diagonal so they don't need to be stored.

Probably, the easiest way to confirm if the descriptor contains the pivots would be to modify an older version on nonpareil and inspect the registers.


Pauli
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Messages In This Thread
Matrix Inversion ANA - churichuro - 06-12-2016, 06:29 PM
RE: Matrix Inversion ANA - Joe Horn - 06-12-2016, 09:30 PM
RE: Matrix Inversion ANA - churichuro - 06-13-2016, 03:27 PM
RE: Matrix Inversion ANA - rprosperi - 06-13-2016, 06:30 PM
RE: Matrix Inversion ANA - churichuro - 06-14-2016, 10:55 PM
RE: Matrix Inversion ANA - rprosperi - 06-15-2016, 01:32 AM
RE: Matrix Inversion ANA - Paul Dale - 06-16-2016, 08:12 AM
RE: Matrix Inversion ANA - churichuro - 06-16-2016, 12:23 AM
RE: Matrix Inversion ANA - Werner - 06-16-2016, 10:27 AM
RE: Matrix Inversion ANA - Paul Dale - 06-16-2016, 10:57 AM
RE: Matrix Inversion ANA - Werner - 06-16-2016, 11:06 AM
RE: Matrix Inversion ANA - Paul Dale - 06-16-2016 11:20 AM
RE: Matrix Inversion ANA - Werner - 06-16-2016, 11:21 AM
RE: Matrix Inversion ANA - Paul Dale - 06-16-2016, 09:45 PM



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