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p-ring (Definition)
Definition 1   Let $R$ be a commutative ring with identity element equipped with a topology defined by a decreasing sequence: $$\ldots \subset \mA_3 \subset \mA_2 \subset \mA_1$$ of ideals such that $\mA_n\cdot \mA_m \subset \mA_{n+m}$ We say that $R$ is a $p$ ring if the following conditions are satisfied:
  1. The residue ring $\overline{k}=R/\mA_1$ is a perfect ring of characteristic $p$
  2. The ring $R$ is Hausdorff and complete for its topology.
Definition 2   A $p$ ring $R$ is said to be strict (or a $p$ adic ring) if the topology is defined by the $p$ adic filtration $\mA_n=p^nR$ and $p$ is not a zero-divisor of $R$
Example 1   The prototype of strict $p$ ring is the ring of $p$ adic integers $\Ints_p$ with the usual profinite topology.

Bibliography

1
J. P. Serre, Local Fields, Springer-Verlag, New York.




"p-ring" is owned by alozano.
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Other names:  $p$-ring, p-adic ring, $p$-adic ring, strict $p$-ring
Also defines:  strict p-ring

Attachments:
Witt vectors (Definition) by alozano
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Cross-references: profinite topology, filtration, strict, complete, Hausdorff, characteristic, perfect ring, ring, residue, ideals, sequence, decreasing, topology, identity element, commutative ring
There is 1 reference to this entry.

This is version 1 of p-ring, born on 2005-05-06.
Object id is 7016, canonical name is PRing.
Accessed 4823 times total.

Classification:
AMS MSC13J10 (Commutative rings and algebras :: Topological rings and modules :: Complete rings, completion)
 13K05 (Commutative rings and algebras :: Witt vectors and related rings)

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