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            <title xml:lang="en">The conformal Laplacian on symmetric 2-tensors</title>
            <title xml:lang="fr">Le Laplacien conforme sur les 2-tenseurs symétriques</title>
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                <title xml:lang="fr">Le Laplacien conforme sur les 2-tenseurs symétriques</title>
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                <term xml:lang="en">Lichnerowicz Laplacian</term>
                <term xml:lang="en">symmetric tensors</term>
                <term xml:lang="en">conformally covariant</term>
                <term xml:lang="fr">Laplacien de Lichnerowicz</term>
                <term xml:lang="fr">Covariant conforme</term>
                <term xml:lang="fr">tenseurs symétriques</term>
                <term xml:lang="fr">Lichnerowicz Laplacian</term>
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              <p>On any  riemannian manifold, we explicit  the conformally covariant Laplacian, acting on all (fields of)  covariant  symmetric tensor of order two. The latter being so far expressed only on Einstein manifold and acting simply on 2-tensors without trace and with zero divergence (TT-tensors).</p>
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              <p>Sur toute variété riemannienne, on explicite le Laplacien covariant conforme, agissant sur tous les (champs de) tenseurs covariants symétriques d'ordre deux. Ce dernier étant jusqu'à présent exprimé uniquement sur les variétés d'Einstein et agissant simplement sur les 2-tenseurs sans trace et à divergence nulle (tenseurs TT).</p>
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