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Creators/Authors contains: "Li, Yatao"

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  1. ; ; ; (, International Mathematics Research Notices)
    Abstract We investigate global solutions to the Euler-alignment system in $$d$$ dimensions with unidirectional flows and strongly singular communication protocols $$\phi (x) = |x|^{-(d+\alpha )}$$ for $$\alpha \in (0,2)$$. Our paper establishes global regularity results in both the subcritical regime $$1<\alpha <2$$ and the critical regime $$\alpha =1$$. Notably, when $$\alpha =1$$, the system exhibits a critical scaling similar to the critical quasi-geostrophic equation. To achieve global well-posedness, we employ a novel method based on propagating the modulus of continuity. Our approach introduces the concept of simultaneously propagating multiple moduli of continuity, which allows us to effectively handle the system of two equations with critical scaling. Additionally, we improve the regularity criteria for solutions to this system in the supercritical regime $$0<\alpha <1$$. 
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  2. ; ; ; ; (, Colloids and Surfaces A: Physicochemical and Engineering Aspects)
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