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math.AG2026
Abundance for threefolds in positive characteristic
Fabio Bernasconi, Jakub Witaszek, Zheng Xu
We prove the abundance conjecture for threefolds in characteristic .
math.AG2026
-nilpotence and Hodge filtrations beyond isolated singularities
Bradley Dirks, Jakub Witaszek
We give Hodge-theoretic characterizations of characteristic-zero varieties of open -nilpotent and open weakly -nilpotent type, extending a result of Srinivas and Takagi beyon…
math.AG2026
Higher F-rational singularities
Tatsuro Kawakami, Jakub Witaszek
We introduce higher -rationality generalising -rationality. We prove that a normal variety over a field of characteristic zero is -rational if and only if it is --ra…