Lambda actions of rings of integers

with B. de Smit

Abstract:
Let O be the ring of integers of a number field K. For an O-algebra R which is torsion free as an O-module we define what we mean by a ΛO-ring structure on R. We can determine whether a finite étale K-algebra E with ΛO-ring structure has an integral model in terms of a Deligne-Ribet monoid of K. This a commutative monoid whose invertible elements form a ray class group.


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The paper's page at arxiv.org

Release notes

2011-May-24: Archive release