## The non-p-part of the class number in a cyclotomic $$\mathbb{Z}_p$$-extension.(English)Zbl 0403.12007

### MSC:

 11R18 Cyclotomic extensions 11R23 Iwasawa theory
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### References:

 [1] Ferrero, B., Washington, L.: The Iwasawa invariant {$$\mu$$} p vanishes for abelian number fields, Ann. of Math. · Zbl 0443.12001 [2] Washington, L.: Class numbers and ? p -extension, Math. Ann.214, 177-193 (1975) · Zbl 0302.12007
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