20 citations · 87 across the 17 of their papers we have counts for
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math.AG2020
Tamely ramified morphisms of curves and Belyi's theorem in positive characteristic
Kiran S. Kedlaya, Daniel Litt, Jakub Witaszek
We show that every smooth projective curve over a finite field k admits a finite tame morphism to the projective line over k. Furthermore, we construct a curve with no such map whe…
math.AG2020
On the relative Minimal Model Program for fourfolds in positive and mixed characteristic
Christopher Hacon, Jakub Witaszek
We show the validity of two special cases of the four-dimensional Minimal Model Program in characteristic : for contractions to -factorial fourfolds and in familie…
math.AG2020
Keel's base point free theorem and quotients in mixed characteristic
Jakub Witaszek
We develop techniques of mimicking the Frobenius action in the study of universal homeomorphisms in mixed characteristic. As a consequence, we show a mixed characteristic Keel's ba…