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Logarithmic Prismatic Cohomology via Logarithmic THH
Published 2 Jun 2023 in math.AG and math.KT | (2306.01368v2)
Abstract: Inspired by Bhatt-Morrow-Scholze's work on ${\rm THH}$, we define Nygaard-completed log prismatic cohomology based on log topological Hochschild homology via filtrations on log ${\rm THH}$ and its variants. Moreover, of independent interest, we describe log ${\rm THH}$ for quasiregular semiperfectoids as a $1$-parameter deformation of ordinary, non-logarithmic Hochschild homology.
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