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Integrais Flashcards

(12 cards)

1
Q

𝛂 ∫ f(z) dz

A

= a ∫b f(𝛂(t)) * 𝛂’(t) dt
𝛂: curva contínua e C1 por pedaços
f: contínua

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2
Q

Reparametrização

A

𝛃: [c,d] -> C reparametrização de 𝛂: [a,b] -> C:
∃h: [c,d] -> [a,b] crescente, bijetiva e C1 pp tal que 𝛃(s) = 𝛂(h(s))

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3
Q

𝛃 ∫ f(z) dz

A

= 𝛂 ∫ f(z) dz

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4
Q

De que é que o integral depende?

A

Traço, sentido
caminho

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5
Q

caminho oposto - 𝛄

A

parametrização do caminho oposto:
~𝛂 : [a,b] -> C , t -> 𝛂(a+b-t)

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6
Q

(- 𝛄) ∫ f(z) dz

A

= - (𝛄 ∫ f(z) dz)

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7
Q

𝛄 ∫ f+g

A

𝛄 ∫ f + 𝛄 ∫ g

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8
Q

𝛄 ∫ 𝛌*f

A

𝛌 * 𝛄 ∫ f

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9
Q

𝛄1 + 𝛄2 ∫ f

A

𝛄1 ∫ f + 𝛄2 ∫ f

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10
Q

Desigualdade

A

. ∫ |f(z)|dz ≤ M ∀ z ∈ 𝛄
-> |𝛄 ∫ f(z) dz|≤ M * l(z)

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11
Q

Primitiva

A

F holomorfa é primitiva sse F’(z) = f(z)

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12
Q

f: u -> C contínua

A

1) f tem uma primitiva em U
sse
2) 𝛄 ∫f(z)dz = 0 para qualquer caminho fechado
sse
3) 𝛄 ∫f(z)dz só dependo do ponto inicial e do ponto final

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