# Title:$\mathbb{Z} R$ and rings of Witt vectors $W_S (R)$

Abstract: Using $\lambda$ operations, we give some results on the kernel of the natural map from the monoid algebra $\mathbb{Z} R$ of a commutative ring $R$ to the ring of $S$-Witt vectors of $R$. As a byproduct we obtain a very natural interpretation of a power series used by Dwork in his proof of the rationality of zeta functions for varieties over finite fields.
 Subjects: Commutative Algebra (math.AC) Cite as: arXiv:1803.00812 [math.AC] (or arXiv:1803.00812v1 [math.AC] for this version)

## Submission history

From: Christopher Deninger [view email]
[v1] Fri, 2 Mar 2018 11:19:51 UTC (10 KB)
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