Page 1 Next

Displaying 1 – 20 of 110

Showing per page

New models for the action of Hecke operators in spaces of Maass wave forms

Ian Kiming (2007)

Annales de l’institut Fourier

Utilizing the theory of the Poisson transform, we develop some new concrete models for the Hecke theory in a space M λ ( N ) of Maass forms with eigenvalue 1 / 4 - λ 2 on a congruence subgroup Γ 1 ( N ) . We introduce the field F λ = ( λ , n , n λ / 2 n ) so that F λ consists entirely of algebraic numbers if λ = 0 .The main result of the paper is the following. For a packet Φ = ( ν p p N ) of Hecke eigenvalues occurring in M λ ( N ) we then have that either every ν p is algebraic over F λ , or else Φ will – for some m – occur in the first cohomology of a certain space W λ , m which is a...

New ramification breaks and additive Galois structure

Nigel P. Byott, G. Griffith Elder (2005)

Journal de Théorie des Nombres de Bordeaux

Which invariants of a Galois p -extension of local number fields L / K (residue field of char p , and Galois group G ) determine the structure of the ideals in L as modules over the group ring p [ G ] , p the p -adic integers? We consider this question within the context of elementary abelian extensions, though we also briefly consider cyclic extensions. For elementary abelian groups G , we propose and study a new group (within the group ring 𝔽 q [ G ] where 𝔽 q is the residue field) and its resulting ramification filtrations....

Newton and Schinzel sequences in quadratic fields

David Adam, Paul-Jean Cahen (2010)

Actes des rencontres du CIRM

We give the maximal length of a Newton or a Schinzel sequence in a quadratic extension of a global field. In the case of a number field, the maximal length of a Schinzel sequence is 1, except in seven particular cases, and the Newton sequences are also finite, except for at most finitely many cases, all real. We give the maximal length of these sequences in the special cases. We have similar results in the case of a quadratic extension of a function field 𝔽 q ( T ) , taking in account that the ring of integers...

Currently displaying 1 – 20 of 110

Page 1 Next