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