Effective finiteness theorems for polynomials with given discriminant and integral elements with given discriminant over finitely domains.
Based on a method of H. W. Lenstra Jr. in this note 143 new Euclidean number fields are given of degree and 10 and of unit rank . The search for these examples also revealed several other fields of small discriminant compared with the lower bounds of Odlyzko.
In this paper, we develop the Euler system theory for Galois deformations. By applying this theory to the Beilinson-Kato Euler system for Hida’s nearly ordinary modular deformations, we prove one of the inequalities predicted by the two-variable Iwasawa main conjecture. Our method of the proof of the Euler system theory is based on non-arithmetic specializations. This gives a new simplified proof of the inequality between the characteristic ideal of the Selmer group of a Galois deformation and the...