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einstein constraint equations 1gluing constructions 1gravitational shielding 1stability analysis 1weighted inequalities 1

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math.AP2026

Harmonic, radial, and shell stability of the weighted Einstein constraints on the sphere at infinity

Bruno Le Floch, Philippe G. LeFloch

We consider fourth-order and second-order partial differential operators localized on domains of the sphere in arbitrary dimension. These operators arise as weighted compositions o…