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THÈSE Nicolas VASSET

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A V r<br />

V η <br />

µ <br />

V ∀t ∈ [0, T ] <br />

<br />

R ℓm E ℓm<br />

A ℓm <br />

<br />

∆ rE ℓm = r ∂Aℓm<br />

∂r + 2Aℓm .<br />

r = 0 r → ∞ <br />

<br />

<br />

S <br />

∇ · V = 0 <br />

S <br />

V µ µ S <br />

A <br />

S <br />

<br />

S <br />

µ A<br />

<br />

<br />

<br />

<br />

R h <br />

h ij (= h ji ) <br />

1(r) 3(ϕ) h <br />

1/r r → ∞ <br />

<br />

∀(θ, ϕ) <br />

∀t ≥ 0, ∀r < R,<br />

∂ 2 h ij<br />

∂t 2 = ∆hij , <br />

∀t ≥ 0, ∀r ≤ R, ∇jh ij = 0, <br />

∀r ≤ R, h ij (0, r, θ, ϕ) = α ij<br />

0 (r, θ, ϕ),<br />

∂h<br />

∀r ≤ R,<br />

ij<br />

<br />

<br />

= γ<br />

∂t<br />

ij<br />

0 (r, θ, ϕ),<br />

t=0<br />

∀t ≥ 0, h ij (t, R, θ, ϕ) = β ij<br />

0 (t, θ, ϕ). <br />

α ij<br />

0 , γ ij<br />

0 β ij<br />

0

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