Well-Posedness of a Class of Radial Inhomogeneous Hartree Equations
Abstract
:1. Introduction
2. Background Material
2.1. Preliminary
2.2. Main Results
- 1.
- the solution satisfies the following conservation laws
- 2.
- , for all admissible pairs in the meaning of Definition 1;
- 3.
- if , then u is global.
- Using Proposition 4 via the Hardy–Littlewood–Sobolev inequality, we obtain
- the assumption is possible, at least for low space dimensions;
- the presence of the derivative term gives the dichotomy and .
- 1.
- the solution satisfies the mass conservation law;
- 2.
- , for all admissible pairs ;
- 3.
- if , then u is global.
- The Strichartz norms and are defined in Definition 1;
- in the defocusing regime, any local solution is global; in the focusing regime, a local solution may be non-global, but for small data, this scenario cannot happen.
- the scattering means that there exists , such that
- the assumptions and allow the use of the Morawetz estimate (2);
- the scattering of energy global solutions is stronger than the decay but not available in the mass-sub-critical regime;
- in a future work, the authors will investigate the energy scattering of global solutions to the Hartree problem (1).
- 1.
- If , there exists , such that for any ,
- 2.
- if , there exists , such that for any ,
2.3. Tools
- 1.
- If , then
- 2.
- if , then
- 1.
- there is , such that for any
- 2.
- there is , such that for any ,
- 1.
- if , there exists , such that for all
- 2.
- if , there exists , such that for any ,
- 1.
- ;
- 2.
3. Well-Posedness
3.1. -Theory
- 1.
- First case: .Take the real numbers andThe equality , given via the condition , isThis is satisfied ifThis is satisfied because . ThenMoreover, with the Hölder estimate, for andMoreover, the assumption givesThis is satisfied ifThe integral on can be estimated similarly. So, for , we obtain , and is stable by the function .
- 2.
- Second case: .By calculus in the estimation of with , rather than , we obtain the requested estimation under the assumptionsThis givesThis is satisfied becauseNow, we need to estimate the termThis is satisfied ifThis is the same above condition.Therefore, for , we obtain . Thus, is stable by the function .
3.2. -Theory
- 1.
- first case .Take the real numbers andSince , the admissibility condition is satisfied ifThis gives the conditionThis is satisfied becauseThen,Now, we estimate the termThe admissibility condition givesThe following condition, which is the same above, yieldsThe term for can be controlled similarly. Therefore, for , we obtain . Thus, is stable under .
- 2.
- Second case .Arguing as previously, via the estimatesHere, we assume the conditions andThis is satisfied ifThis is satisfied ifThe following term needs to be estimated; therefore, we haveThis is satisfied ifThis is the same above condition. Therefore, we do not need any supplementary condition.Therefore, for , we obtain . Thus, is stable under .
4. Global Existence
- 1.
- Case one: . Taking and , we obtainCoupling this condition withThe estimate of the term follows similarly, and also, we haveTherefore,
- 2.
- . Taking into account the calculus of the first case , we obtainTaking , the above condition is satisfied ifSimilarly, we obtainTherefore,
5. Decay of Defocusing Global Solutions
- Claim.
6. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Data Availability Statement
Acknowledgments
Conflicts of Interest
Appendix A
Appendix A.1. Proof of Proposition 1
Appendix A.2. Proof of Proposition 2
Appendix A.2.1. H1-Gagliardo–Nirenberg Inequality
Appendix A.2.2. Fractional Gagliardo–Nirenberg Inequality
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Almuthaybiri, S.; Ghanmi, R.; Saanouni, T. Well-Posedness of a Class of Radial Inhomogeneous Hartree Equations. Mathematics 2023, 11, 4713. https://doi.org/10.3390/math11234713
Almuthaybiri S, Ghanmi R, Saanouni T. Well-Posedness of a Class of Radial Inhomogeneous Hartree Equations. Mathematics. 2023; 11(23):4713. https://doi.org/10.3390/math11234713
Chicago/Turabian StyleAlmuthaybiri, Saleh, Radhia Ghanmi, and Tarek Saanouni. 2023. "Well-Posedness of a Class of Radial Inhomogeneous Hartree Equations" Mathematics 11, no. 23: 4713. https://doi.org/10.3390/math11234713
APA StyleAlmuthaybiri, S., Ghanmi, R., & Saanouni, T. (2023). Well-Posedness of a Class of Radial Inhomogeneous Hartree Equations. Mathematics, 11(23), 4713. https://doi.org/10.3390/math11234713