Ein formales Verfahren zur Herstellung parameter-abhängiger Scharen quadratischer Grundeinheiten.
For an atomic domain , its elasticity is defined by : for irreducible . We study the elasticity of one-dimensional noetherian domains by means of the more subtle invariants defined by : for irreducible . As a main result we characterize all orders in algebraic number fields having finite elasticity. On the way, we obtain a series of results concerning the invariants and for monoids and integral domains which are of independent interest.
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.