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Transformari liniare

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No¸tiunea de transformare liniară<br />

Transformări <strong>liniare</strong> între spa¸tii finit dimensionale<br />

Valori ¸si vectori proprii<br />

Lema lui Gersgorin<br />

Lemă<br />

Fie A ∈ Mn(C). Pentru orice i = 1, · · · , n fie<br />

Are loc<br />

ri =<br />

n<br />

j=1,j=i<br />

Diagonalizarea matricei unei transformări<br />

Polinom caracteristic<br />

|aij| Di = {z ∈ C | |z − aii| ≤ ri}.<br />

σ(A) ⊂<br />

n<br />

Di,<br />

unde σ(A) este spectrul transformării <strong>liniare</strong> de matrice A.<br />

i=1<br />

Transformări <strong>liniare</strong>

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