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math.AC2025
Faster computation of Witt vectors over polynomial rings
Rubén Muñoz--Bertrand
We describe an algorithm which computes the ring laws for Witt vectors of finite length over a polynomial ring with coefficients in a finite field. This algorithm uses an isomorphi…
math.AC2025
Characterising properties of commutative rings using Witt vectors
Rubén Muñoz--Bertrand
We give equivalences between given properties of a commutative ring, and other properties on its ring of Witt vectors. Amongst them, we characterise all commutative rings whose rin…