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arxiv: 1409.4156 · v2 · pith:UDIG7QSInew · submitted 2014-09-15 · 🧮 math.AC · math.AG· math.AT· math.CT· math.NT

Witt vectors and truncation posets

classification 🧮 math.AC math.AGmath.ATmath.CTmath.NT
keywords truncationvectorswittposetsmapsadditiondefineencode
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One way to define Witt vectors starts with a truncation poset $S \subset \mathbb{N}$. We generalize Witt vectors to truncation posets, and show how three types of maps of truncation posets can be used to encode the following six structure maps on Witt vectors: addition, multiplication, restriction, Frobenius, Verschiebung and norm.

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