Communications in Partial Differential Equations· 2026Q1
Sharp well-posedness for the k-dispersion generalized Benjamin-Ono equations: short and long time results
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- 2026year
Short summary
This paper establishes sharp local and global well-posedness for the k-dispersion generalized Benjamin-Ono (k-DGBO) equations with power nonlinearities (k >= 4) in critical and subcritical regimes, and develops a scattering theory for small data.
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Key points
- Established sharp local and global well-posedness for k-DGBO equations (k >= 4) in critical/subcritical regimes.
- Developed a scattering criterion and theory for small data using novel methods.
- Obtained local well-posedness for the 3-DGBO equation via frequency-restricted estimates.
- Derived new nonlinear smoothing estimates as a byproduct.
AI-generated from the title and abstract; the full text is not read.
Abstract
We consider the $k$-dispersion generalized Benjamin-Ono ($k$-DGBO) equations. For nonlinearities with power $k \geq 4$, we establish local and global well-posedness results for the associated initial value problem (IVP) in both the critical and subcritical regimes, addressing sharp regularity in homogeneous and inhomogeneous Sobolev spaces. Additionally, our method enables the formulation of a scattering criterion and a scattering theory for small data. We also investigate the case $k = 3$ via frequency-restricted estimates, obtaining local well-posedness results for the IVP associated with the $3$-DGBO equation and generalizing the existing results in the literature for the whole subcritical range. For higher dispersion, these local results can be extended globally even for rough data, particularly for initial data in Sobolev spaces with negative indices. As a byproduct, we derive new nonlinear smoothing estimates.
The authors' abstract, as published at the source. Communications in Partial Differential Equations, 2026 · DOI ↗
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Field: Mathematical Physics
Mathematical PhysicsMathematics