Matrices Flashcards

0
Q

Comment traduire Ci<–aCi

A

A’ =ADi(a)

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1
Q

Donnez les matrices d’opération élémentaire dans Mn(K)

A

Dilatation : Di(a) = In+(a-1)Ei,i
Transvection: Ti,j(a)= In+aEi,j
Permutation: Pi,j=In-Ei,i-Ej,j+Ei,j+Ej,i

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2
Q

Comment traduire Li<–aLi

A

A’=Di(a)A

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3
Q

A inversible équivalent à?

A

1)Ax=0 n’admet que la solution nulle
pour tt B dans Kn:
2) AX=B unique solution
3) AX=B au moins une solution

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