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The effect of pinching conditions in prescribing \( Q \)-curvature on standard spheres

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Abstract

In this paper, we study the problem of prescribing a fourth-order conformal invariant on standard spheres. This problem is variational but it is noncompact due to the presence of nonconverging orbits of the gradient flow, the so called critical points at infinity. Following the method advised by Bahri we determine all such critical points at infinity and compute their contribution to the difference of topology between the level sets of the associated Euler–Lagrange functional. We then derive some existence results under pinching conditions.

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Authors and Affiliations

  1. Department of Mathematics, College of Science, Qassim University, Buraidah, 51452, Saudi Arabia

    Mohamed Ben Ayed & Khalil El Mehdi

  2. Faculté des Sciences de Sfax, Université de Sfax, Route Soukra, 3000, Sfax, Tunisia

    Mohamed Ben Ayed

  3. Faculté des Sciences et Techniques, Université de Nouakchott, Nouakchott, Mauritania

    Khalil El Mehdi

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  1. Mohamed Ben Ayed
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  2. Khalil El Mehdi
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Correspondence to Mohamed Ben Ayed.

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Ben Ayed, M., El Mehdi, K. The effect of pinching conditions in prescribing \( Q \)-curvature on standard spheres. Ann Glob Anal Geom 63, 4 (2023). https://doi.org/10.1007/s10455-022-09878-6

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