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Showing 1 to 1 of 1 for “"Newton diagrams"”.
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Purity of the stratification by Newton polygons and Frobenius-periodic vector bundles
… we show a purity theorem for stratifications by Newton polygons coming from crystalline cohomology, which says that the family of Newton polygons over a noetherian scheme have a common break point if this is true outside a subscheme of codimension bigger than 1. The proof is similar to the proof …