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MATEMATIKA 1 Senka Banic PREDAVANJA (grupa G1): utorak i ...

MATEMATIKA 1 Senka Banic PREDAVANJA (grupa G1): utorak i ...

MATEMATIKA 1 Senka Banic PREDAVANJA (grupa G1): utorak i ...

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PITANJE: Kako racunati rang matrice?Da bismo odredili rang matrice A elementarnimtransformacijama je svodimo na njoj ekvivalentnumatricu B trokutastog oblika kojoj je rang evidentan:23b 11 b 12 b 13 b 1r b 1r+1 b 1n0 b 22 b 23 b 2r b 2r+1 b 2n0 0 b 33 b 3r b 3r+1 b 3nA B =. . . . . . . .0 0 0 b rr b rr+1 b rn6 0 0 0 0 0 074 . . . . . . 50 0 0 0 0 0Ispod glavne dijagonale matrice B su nule. Ukolikosu svi b 11 ; b 22 ; :::; b rr razliciti od nule tada uocavamominoru reda r :b 11 b 12 b 13 b 1r0 b 22 b 23 b 2r0 0 b 33 b 3r. . ... .0 0 b rr = b 11 b 22 ::: b rr 6= 0;pa je rang A = rang B = r:(r broj ne-nul redaka matrice B:)

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