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Ternary quadratic forms with rational zeros

John Friedlander, Henryk Iwaniec (2010)

Journal de Théorie des Nombres de Bordeaux

We consider the Legendre quadratic forms ϕ a b ( x , y , z ) = a x 2 + b y 2 - z 2 and, in particular, a question posed by J–P. Serre, to count the number of pairs of integers 1 a A , 1 b B , for which the form ϕ a b has a non-trivial rational zero. Under certain mild conditions on the integers a , b , we are able to find the asymptotic formula for the number of such forms.

Terne di quadrati consecutivi in un campo di Galois

Umberto Bartocci, Emanuela Ughi (1981)

Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni

Explicit formulae for the number of triplets of consecutive squares in a Galois field F q are given.

The 2-Sylow subgroups of the tame kernel of imaginary quadratic fields

Hourong Qin (1995)

Acta Arithmetica

1. Introduction. Let F be a number field and O F the ring of its integers. Many results are known about the group K O F , the tame kernel of F. In particular, many authors have investigated the 2-Sylow subgroup of K O F . As compared with real quadratic fields, the 2-Sylow subgroups of K O F for imaginary quadratic fields F are more difficult to deal with. The objective of this paper is to prove a few theorems on the structure of the 2-Sylow subgroups of K O F for imaginary quadratic fields F. In our Ph.D. thesis (see...

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