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Aproximarea functionalelor liniare

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Introducere<br />

Derivare numerică<br />

Integrare numerică<br />

Cuadraturi adaptive<br />

Cuadraturi . . .<br />

Cuadraturi . . .<br />

Formule . . .<br />

Home Page<br />

Title Page<br />

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Page 41 of 58<br />

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Quit<br />

6. Cuadraturi adaptive II<br />

Coloana a doua din metoda lui Romberg corespunde aproximării<br />

prin metoda lui Simpson. Notăm<br />

Sk,1 = Rk,2.<br />

Coloana a treia este deci o combinat¸ie a două aproximante de<br />

tip Simpson:<br />

Relat¸ia<br />

Sk,2 = Sk,1 + Sk,1 − Sk−1,1<br />

15<br />

= Rk,2 + Rk,2 − Rk−1,2<br />

.<br />

15<br />

Sk,2 = Sk,1 + Sk,1 − Sk−1,1<br />

, (31)<br />

15<br />

va fi folosită la elaborarea unui algoritm de cuadratură adaptivă.

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