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Forum Studenti •Forme differenziali chiuse su insiemi non sempl. connessi
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Forme differenziali chiuse su insiemi non sempl. connessi

Inviato: mercoledì 12 giugno 2019, 22:49
da matt_frascarelli
Ciao a tutti :D
Volevo chiarire alcuni dubbi riguardo alle forme differenziali chiuse, ma su insiemi con i "buchi". In riferimento a una forma a valori in R2:
Davanti a un caso di questo tipo posso trovare una primitiva, e questo mi assicura dell'esattezza della forma, oppure posso cercare una curva chiusa, come la classica circonferenza con centro nel punto di non definizione, e vedere quanto fa la circuitazione.
Però, se la circuitazione fosse nulla, potrei concludere che la forma è esatta? Oppure deve valere per ogni curva chiusa?
E se fosse no-nulla, potrei concludere che non lo è?
Inoltre non ho ben capito il discorso sulla restrizione della forma ad un insieme semplicemente connesso, dove è esatta...

Grazie in anticipo :)

Re: Forme differenziali chiuse su insiemi non sempl. connessi

Inviato: venerdì 14 giugno 2019, 14:38
da ghisi

Re: Forme differenziali chiuse su insiemi non sempl. connessi

Inviato: venerdì 14 giugno 2019, 15:14
da matt_frascarelli
Grazie mille prof.
Riguardo alla seconda parte della domanda sono stato vago perchè sinceramente non sapevo precisamente cosa cercare, ma il Teorema che ha enunciato è esattamente quello che volevo sapere. :D