For a prime number l, let h> J be the class number of the maximal real subfield of the l-th cyclotomic field. For each natural number N, it is plausible but not yet proved that there exist infinitely many prime numbers l with h> J 'N. We prove an analogous assertion for cyclotomic function fields.
On the Class Numbers of the Maximal Real Subfields of Cyclotomic Function Fields, II
✍ Scribed by Humio Ichimura
- Publisher
- Elsevier Science
- Year
- 1998
- Tongue
- English
- Weight
- 229 KB
- Volume
- 72
- Category
- Article
- ISSN
- 0022-314X
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✦ Synopsis
Let q be a power of a prime number p and k=F q (T ) the rational function field with a fixed indeterminate T. For an irreducible monic P=P(T ) in R=F q [T], let k(P) + be the maximal real subfield of the P th cyclotomic function field and h + T (P) the class number of k(P) + associated to R. We prove that there exist infinitely many irreducible monics P in R with p | h + T (P) under some assumptions on q.
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