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THÈSE Nicolas VASSET

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(r, θ, ϕ) R 3 <br />

(∂/∂r, ∂/∂θ, ∂/∂ϕ) <br />

<br />

er = ∂<br />

∂r , eθ = 1 ∂<br />

r ∂θ , eϕ = 1<br />

rθ<br />

∂<br />

. <br />

∂ϕ<br />

<br />

Σt <br />

fij = diag(1, 1, 1) <br />

<br />

<br />

<br />

<br />

<br />

<br />

<br />

<br />

<br />

<br />

f [a, b] <br />

<br />

f <br />

N <br />

{xi}i∈[1,N] ∈ [a, b] x1 = a xN = b <br />

f(xi)

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