41CL Quiz: Determinant of 30x30 anti-Identity matrix
05-11-2018, 06:06 PM
Post: #2
 Valentin Albillo Senior Member Posts: 1,100 Joined: Feb 2015
RE: 41CL Quiz: Determinant of 30x30 anti-Identity matrix
(05-11-2018 09:10 AM)Ángel Martin Wrote:  This quiz is just for you, proud owners of a 41CL: -

Sorry, Ángel, you know I couldn't resist ...

Quote:Calculate the determinant of a 30x30 matrix with all elements equal to "1" except the diagonal, which has all zeros. I call this type "anti-Identity", but it's totally made up for you purists out there so don't nail me down just yet.

The exact result is Det = -29

My solution returns -28.999999977 in 11 minutes, give or take...

I know, I know, this is just for the 41CL but nevertheless here's the result for the HP-71B under J-F Garnier's Emu71. From the command line:

>DESTROY ALL @ OPTION BASE 1 @ DIM A(30,30),C(30,30)
>MAT A=CON @ MAT C=IDN @ MAT A=A-C @ DET(A)

-29.0000000001

The timing is 0.15 seconds, give or take a hundredth ...

Have a nice weekend and best regards.
V.

All My Articles & other Materials here:  Valentin Albillo's HP Collection

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 Messages In This Thread 41CL Quiz: Determinant of 30x30 anti-Identity matrix - Ángel Martin - 05-11-2018, 09:10 AM RE: 41CL Quiz: Determinant of 30x30 anti-Identity matrix - Valentin Albillo - 05-11-2018 06:06 PM RE: 41CL Quiz: Determinant of 30x30 anti-Identity matrix - Ángel Martin - 05-11-2018, 07:34 PM RE: 41CL Quiz: Determinant of 30x30 anti-Identity matrix - Valentin Albillo - 05-11-2018, 08:04 PM RE: 41CL Quiz: Determinant of 30x30 anti-Identity matrix - Gene - 05-11-2018, 08:41 PM RE: 41CL Quiz: Determinant of 30x30 anti-Identity matrix - Ángel Martin - 05-12-2018, 05:21 AM RE: 41CL Quiz: Determinant of 30x30 anti-Identity matrix - John Keith - 05-11-2018, 07:48 PM RE: 41CL Quiz: Determinant of 30x30 anti-Identity matrix - Joe Horn - 05-12-2018, 02:50 AM RE: 41CL Quiz: Determinant of 30x30 anti-Identity matrix - Gerson W. Barbosa - 05-18-2018, 03:47 AM RE: 41CL Quiz: Determinant of 30x30 anti-Identity matrix - brickviking - 05-17-2018, 09:58 AM RE: 41CL Quiz: Determinant of 30x30 anti-Identity matrix - klesl - 05-17-2018, 04:55 PM RE: 41CL Quiz: Determinant of 30x30 anti-Identity matrix - brickviking - 05-17-2018, 10:36 PM RE: 41CL Quiz: Determinant of 30x30 anti-Identity matrix - Claudio L. - 05-17-2018, 01:55 PM RE: 41CL Quiz: Determinant of 30x30 anti-Identity matrix - Carsen - 05-18-2018, 05:50 AM RE: 41CL Quiz: Determinant of 30x30 anti-Identity matrix - hibiki - 05-18-2018, 06:48 PM RE: 41CL Quiz: Determinant of 30x30 anti-Identity matrix - Valentin Albillo - 05-18-2018, 09:13 PM RE: 41CL Quiz: Determinant of 30x30 anti-Identity matrix - Gene - 05-18-2018, 09:39 PM RE: 41CL Quiz: Determinant of 30x30 anti-Identity matrix - Valentin Albillo - 05-18-2018, 10:58 PM RE: 41CL Quiz: Determinant of 30x30 anti-Identity matrix - Gene - 05-19-2018, 12:33 AM RE: 41CL Quiz: Determinant of 30x30 anti-Identity matrix - Valentin Albillo - 05-19-2018, 04:50 AM RE: 41CL Quiz: Determinant of 30x30 anti-Identity matrix - Valentin Albillo - 05-19-2018, 11:53 PM RE: 41CL Quiz: Determinant of 30x30 anti-Identity matrix - Werner - 05-20-2018, 09:21 AM RE: 41CL Quiz: Determinant of 30x30 anti-Identity matrix - Valentin Albillo - 05-20-2018, 03:09 PM RE: 41CL Quiz: Determinant of 30x30 anti-Identity matrix - J-F Garnier - 05-20-2018, 03:39 PM RE: 41CL Quiz: Determinant of 30x30 anti-Identity matrix - Werner - 05-21-2018, 09:41 AM RE: 41CL Quiz: Determinant of 30x30 anti-Identity matrix - J-F Garnier - 05-22-2018, 07:46 AM RE: 41CL Quiz: Determinant of 30x30 anti-Identity matrix - toml_12953 - 05-22-2018, 08:50 AM RE: 41CL Quiz: Determinant of 30x30 anti-Identity matrix - brickviking - 05-18-2018, 11:02 PM RE: 41CL Quiz: Determinant of 30x30 anti-Identity matrix - Ángel Martin - 05-19-2018, 05:14 AM RE: 41CL Quiz: Determinant of 30x30 anti-Identity matrix - Ángel Martin - 05-23-2018, 11:31 AM RE: 41CL Quiz: Determinant of 30x30 anti-Identity matrix - Ángel Martin - 05-31-2018, 07:40 AM RE: 41CL Quiz: Determinant of 30x30 anti-Identity matrix - rprosperi - 05-31-2018, 12:55 PM RE: 41CL Quiz: Determinant of 30x30 anti-Identity matrix - Valentin Albillo - 06-02-2018, 11:41 PM RE: 41CL Quiz: Determinant of 30x30 anti-Identity matrix - Gerson W. Barbosa - 06-03-2018, 03:56 AM RE: 41CL Quiz: Determinant of 30x30 anti-Identity matrix - Gerson W. Barbosa - 06-03-2018, 05:36 AM RE: 41CL Quiz: Determinant of 30x30 anti-Identity matrix - Valentin Albillo - 06-04-2018, 10:04 PM RE: 41CL Quiz: Determinant of 30x30 anti-Identity matrix - Gene - 05-20-2018, 12:06 AM RE: 41CL Quiz: Determinant of 30x30 anti-Identity matrix - Werner - 05-21-2018, 09:37 AM RE: 41CL Quiz: Determinant of 30x30 anti-Identity matrix - ijabbott - 05-22-2018, 11:17 PM RE: 41CL Quiz: Determinant of 30x30 anti-Identity matrix - Gerson W. Barbosa - 05-22-2018, 11:40 PM RE: 41CL Quiz: Determinant of 30x30 anti-Identity matrix - brickviking - 05-23-2018, 01:30 AM RE: 41CL Quiz: Determinant of 30x30 anti-Identity matrix - Gerson W. Barbosa - 05-23-2018, 02:29 AM RE: 41CL Quiz: Determinant of 30x30 anti-Identity matrix - Claudio L. - 05-23-2018, 06:00 PM RE: 41CL Quiz: Determinant of 30x30 anti-Identity matrix - pier4r - 05-23-2018, 06:52 PM RE: 41CL Quiz: Determinant of 30x30 anti-Identity matrix - Gene - 05-31-2018, 03:42 PM RE: 41CL Quiz: Determinant of 30x30 anti-Identity matrix - rprosperi - 05-31-2018, 05:39 PM RE: 41CL Quiz: Determinant of 30x30 anti-Identity matrix - Ángel Martin - 05-31-2018, 06:41 PM RE: 41CL Quiz: Determinant of 30x30 anti-Identity matrix - MikeOShea - 05-31-2018, 08:09 PM RE: 41CL Quiz: Determinant of 30x30 anti-Identity matrix - Didier Lachieze - 05-31-2018, 08:19 PM RE: 41CL Quiz: Determinant of 30x30 anti-Identity matrix - MikeOShea - 06-01-2018, 01:41 AM RE: 41CL Quiz: Determinant of 30x30 anti-Identity matrix - Ángel Martin - 06-05-2018, 07:42 AM RE: 41CL Quiz: Determinant of 30x30 anti-Identity matrix - Ángel Martin - 06-05-2018, 01:40 PM RE: 41CL Quiz: Determinant of 30x30 anti-Identity matrix - Massimo Gnerucci - 06-05-2018, 02:51 PM RE: 41CL Quiz: Determinant of 30x30 anti-Identity matrix - Gerson W. Barbosa - 06-05-2018, 05:24 PM RE: 41CL Quiz: Determinant of 30x30 anti-Identity matrix - Valentin Albillo - 06-05-2018, 09:55 PM

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