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Forum Studenti •dubbi sviluppo di taylor
Pagina 1 di 1

dubbi sviluppo di taylor

Inviato: sabato 26 ottobre 2019, 17:04
da M.A.L
Salve ho un dubbio su sullo svolgimento di un esercito del genere sin(x^2+y^3) sviluppato intorno a (0,0) e stabilire se l'origine è max min locale.
se ho capito bene Se ho lo sviluppo di una funzione , devo guardare se c'è o meno il termine del primo ordine: se c'è, allora il gradiente calcolato nell'origine non è nullo, quindi non è stazionario; se non c'è, allora avviene il contrario ma se è stazionario come dico se è di max/min locale? grazie

Re: dubbi sviluppo di taylor

Inviato: sabato 26 ottobre 2019, 17:36
da M.A.L
posso provare con delle curve vicino al punto e vedere come si comporta?

Re: dubbi sviluppo di taylor

Inviato: sabato 26 ottobre 2019, 18:07
da M.A.L
adesso allego un file contenente alcuni esercizi che ho provato a fare... quelli su cui ho avuto più difficoltà e su cui credo di aver fatto errori sono (a parte qualcuno su max/min su insiemi limitati )gli ultimi su matrice hessiana e sviluppi. Però aspetto la correzione per capire meglio gli errori che faccio grazie e buona serata

Re: dubbi sviluppo di taylor

Inviato: sabato 26 ottobre 2019, 18:08
da M.A.L
ecco il file

Re: dubbi sviluppo di taylor

Inviato: sabato 26 ottobre 2019, 20:47
da GIMUSI
Limitatamente agli ultimi esercizi, mi pare che le tue soluzioni siano corrette.

Quando il test con la Hessiana non funziona, bisogna tentare con "percorsi" o altri metodi.

Te ne propongo un altro


Re: dubbi sviluppo di taylor

Inviato: lunedì 28 ottobre 2019, 9:01
da ghisi

Re: dubbi sviluppo di taylor

Inviato: lunedì 28 ottobre 2019, 9:06
da ghisi

Re: dubbi sviluppo di taylor

Inviato: martedì 29 ottobre 2019, 20:24
da M.A.L
Grazie per le correzioni ho alcune domande :
- nei primi esercizi quando ho detto che inf era un determinato valore come dovrei impostare la stima dal basso?(non mi è molto chiaro)
-in un altro esercizio mi ha scritto che la matrice hessiana mi esclude solo i punti di max perchè non basta come dimostrazione
-infine quando ho gli o-piccoli non ho capito bene come gestirli

Re: dubbi sviluppo di taylor

Inviato: mercoledì 30 ottobre 2019, 8:46
da ghisi