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.dsy:it. : Powered by vBulletin version 2.3.1 .dsy:it. > Didattica > Corsi G - M > Matematica del discreto > [DETERMINANTE]Trovalo!
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Walter
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Registered: Mar 2002
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Anno: fine!
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In generale sì.
Comunque, perchè la matrice rettangolare abbia ordine 4, devi trovare almeno una matrice 4x4 il cui determinante sia diverso da zero.

Per verificare i calcoli su ranghi e determinanti, ti consiglio di usare ad esempio il programma gratuito Scilab (per Windows, Mac OS X e Linux). In questo caso:

// definisci la matrice
-->A=[1,3,-1,0,3; 0,0,-2,1,7; 1,0,1,-1,1; 0,0,2,-3,0]
A =

1. 3. - 1. 0. 3.
0. 0. - 2. 1. 7.
1. 0. 1. - 1. 1.
0. 0. 2. - 3. 0.

// calcola il rango
-->rank(A)
ans =

4.

// calcola il determinante della matrice composta dalle colonne 1, 2, 3, 4
-->det(A(:,[1:4]))
ans =

12.

// calcola il determinante della matrice composta dalle colonne 2, 3, 4, 5
-->det(A(:,[2:5]))
ans =

- 33.

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Last edited by Walter on 12-01-2007 at 12:21

12-01-2007 12:18
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Pupino
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Posts: 4223 (0.52 al dì)
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Originally posted by Walter
In generale sì.



Grande!!! Sei proprio un gallo!!! :D

Grazie mille!!!! :birrozza:

:ola:

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12-01-2007 12:54
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