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In this work, we study the short-time existence theory of Ricci-DeTurck flow starting from rough metrics which satisfy a Morrey-type integrability condition. Using the rough existence theory, we show the preservation and improvement of distributional scalar curvature lower bounds provided the singular set for such metrics is not too large. As an application, we use the Ricci flow smoothing to study the removable singularity in positive mass theorem under Morrey regularity conditions. Our result supplements those of Jiang-Sheng-Zhang.
Lee et al. (Tue,) studied this question.
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