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Creators/Authors contains: "Sturm, Jacob"

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  1. Free, publicly-accessible full text available June 1, 2026
  2. Diameter estimates for K\"ahler metrics are established which require only an entropy bound and no lower bound on the Ricci curvature. The proof builds on recent PDE techniques for $$L^\infty$$ estimates for the Monge-Amp\`ere equation, with a key improvement allowing degeneracies of the volume form of codimension strictly greater than one. As a consequence, diameter bounds are obtained for long-time existence of the K\"ahler-Ricci flow and finite-time solutions when the K\"ahler class is big, as well as for special vibrations of Calabi-Yau manifolds. 
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  3. Abstract The stable reduction theorem says that a family of curves of genus$$g\ge 2$$ g 2 over a punctured curve can be uniquely completed (after possible base change) by inserting certain stable curves at the punctures. We give a new this result for curves defined over$${\mathbb {C}}$$ C , using the Kähler–Einstein metrics on the fibers to obtain the limiting stable curves at the punctures. 
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