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THÈSE Nicolas VASSET

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∇ · D0 = 0 W <br />

W µ <br />

W θ ϕ <br />

∂rW η W η W r<br />

+ − <br />

r r<br />

W D0 <br />

<br />

<br />

A =<br />

∂W η<br />

∂r<br />

+ W η<br />

r<br />

r W<br />

− . <br />

r<br />

D0 = 0 ⇐⇒ W µ = 0 A = 0. <br />

<br />

<br />

<br />

<br />

V µ<br />

A V r V η <br />

<br />

(∆V) η = ∆V η r V<br />

+ 2<br />

, <br />

r2 (∆V) µ = ∆V µ . <br />

µ <br />

<br />

∂ 2 V µ<br />

∂t 2 = ∆V µ . <br />

A <br />

<br />

∂2A = ∆A. <br />

∂t2 <br />

V <br />

<br />

<br />

<br />

F <br />

Φ Ψ <br />

F = ∇ × (Ψk) + ∇ × ∇ × (Φk) <br />

k <br />

<br />

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