Jakub Witaszek

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20242026

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math.AG2025

Inversion of adjunction for higher rational singularities

Tatsuro Kawakami, Jakub Witaszek

We prove inversion of adjunction for higher rational singularities.

math.AG2025

Frobenius liftable hypersurfaces

Tatsuro Kawakami, Supravat Sarkar, Jakub Witaszek

Let $D$ be a reduced divisor in $P_{k}^{n}$ for an algebraically closed field $k$ of positive characteristic $p > 0$ . We prove that if $(P_{k}^{n}, D)$ is Frobenius liftabl…