Note on a Cubic Character Sum.
Under the assumption that the ternary form x² + 2y² + 5z² + xz represents all odd positive integers, we prove that a ternary quadratic form ax² + by² + cz² (a,b,c ∈ ℕ) represents all positive integers n ≡ 4(mod 8) if and only if it represents the eight integers 4,12,20,28,52,60,140 and 308.
Explicit normal integral bases are given for some cyclic quintic fields defined by Emma Lehmer’s parametric family of quintics.
An elementary proof is given of an arithmetic formula, which was stated but not proved by Liouville. An application of this formula yields a formula for the number of representations of a positive integer as the sum of twelve triangular numbers.
Nei problemi di ciclotomia interessa conoscere il numero delle soluzioni della congruenza (), p dispari. Il caso e = 5 fu trattato completamente da L. E. Dickson; gli Autori trattano ora il caso e = 7.
Let denote the field of rational numbers. Let be a cyclic quartic extension of . It is known that there are unique integers , , , such that where The conductor of is , where A simple proof of this formula for is given, which uses the basic properties of quartic Gauss sums.
Page 1 Next