Abstract
We show global well-posedness of certain type of strong-in-time and weak-in-space solutions for the Cauchy problem of the 1-dimensional nonlinear Schrödinger equation, in various cases of open sets, bounded and unbounded. These solutions do not vanish at the boundary or at infinity.
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Notes
- 1.
That is, in \(\sigma \!\left( L^\infty \!\left( J;\mathcal {F}^*\right) ,L^1\!\left( J;\mathcal {F}\right) \right) \). Note that \(L^\infty \!\left( J;\mathcal {F}^*\right) \!\cong \!\left( L^1\!\left( J;\mathcal {F}\right) \right) ^*\) (see, e.g., [5] Theorem 1, Sect. \(\text {IV}.1\)).
- 2.
This specific subset is an orthogonal basis of both \({H_0^1\!\left( U;{\mathbb {C}}\right) }\) and \({L^2\!\left( U;{\mathbb {C}}\right) }\).
- 3.
We can modify the reflection technique used for the proof of this result, in order to cover the case of the extension of \(H^2\)-functions. In particular, we can apply the reflection technique used for Theorem 5.19 in [1].
- 4.
For the \(H^2\)-regularity, we define \(\mathbf {v}_m^k\!:=\!\eta _k\mathcal {E}_U\mathbf {u}_m^k\), for all \({m\!\in \!\mathrm{I\!N}}\).
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Acknowledgements
– N. G. acknowledges that this research has been co-financed—via a programme of State Scholarships Foundation (IKY)—by the European Union (European Social Fund—ESF) and Greek national funds through the action entitled “Strengthening Human Resources Research Potential via Doctorate Research” (contract number: 2016–\(E\!\Sigma \!\Pi \! A\)–050-0502-5534) in the framework of the Operational Program “Human Resources Development Program, Education and Lifelong Learning” of the National Strategic Reference Framework (NSRF) 2014–2020.
– I. G. S. acknowledges that this work was made possible by NPRP grant #[8-764-160] from Qatar National Research Fund (a member of Qatar Foundation).
– The findings achieved herein are solely the responsibility of the authors.
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Gialelis, N., Stratis, I.G. (2019). On the 1-dim Defocusing NLS Equation with Non-vanishing Initial Data at Infinity. In: Karapetyants, A., Kravchenko, V., Liflyand, E. (eds) Modern Methods in Operator Theory and Harmonic Analysis. OTHA 2018. Springer Proceedings in Mathematics & Statistics, vol 291. Springer, Cham. https://doi.org/10.1007/978-3-030-26748-3_19
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