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A convex integration scheme for the continuity equation past the Sobolev embedding threshold

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arxiv 2504.03578 v1 pith:6MBPZF5O submitted 2025-04-04 math.AP

classification math.AP
keywords convexdeltafracintegrationcontinuityembeddingequationscheme
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abstract

We introduce a convex integration scheme for the continuity equation in the context of the Di Perna-Lions theory that allows to build incompressible vector fields in $C_{t}W^{1,p}_x$ and nonunique solutions in $C_{t} L^{q}_x$ for any $p,q$ with $\frac{1}{p} + \frac{1}{q} > 1 + \frac{1}{d}- \delta$ for some $\delta>0$. This improves the previous bound, corresponding to $\delta=0$, or equivalently $q' > p^*$, obtained with convex integration so far, and critical for those schemes in view of the Sobolev embedding that guarantees that solutions are distributional in the opposite range.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Zero-noise selection and Large Deviations in $L^\infty_t L^p_x$ for the stochastic transport equation beyond DiPerna-Lions

    math.PR 2025-06 conditional novelty 8.0 of 10

    Rough transport noise selects the unique DiPerna-Lions solution in the zero-noise limit and yields a large deviations principle in the non-separable space L^∞_t L^p_x.

  2. A priori error estimates for the $\theta$-method for the flow of nonsmooth velocity fields

    math.AP 2025-06 conditional novelty 5.0 of 10

    The theta-method for ODEs with divergence-free Sobolev velocity fields converges to the regular Lagrangian flow at rate 1/|log h| in L1.

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