Results 21 to 30 of about 204 (49)

On lower bounds for cohomology growth in p-adic analytic towers

open access: yes, 2013
Let p and l be two distinct prime numbers and let G be a group. We study the asymptotic behaviour of the mod-l Betti numbers in p-adic analytic towers of finite index subgroups.
Kionke, Steffen
core   +1 more source

Denominators of Eisenstein cohomology classes for GL_2 over imaginary quadratic fields

open access: yes, 2006
We study the arithmetic of Eisenstein cohomology classes (in the sense of G. Harder) for symmetric spaces associated to GL_2 over imaginary quadratic fields.
A. Fröhlich   +30 more
core   +4 more sources

Lefschetz numbers of symplectic involutions on arithmetic groups

open access: yes, 2013
The reduced norm-one group G of a central simple algebra is an inner form of the special linear group, and an involution on the algebra induces an automorphism of G. We study the action of such automorphisms in the cohomology of arithmetic subgroups of G.
Kionke, Steffen
core   +1 more source

On the cohomology of linear groups over imaginary quadratic fields

open access: yes, 2013
Let Gamma be the group GL_N (OO_D), where OO_D is the ring of integers in the imaginary quadratic field with discriminant D= -24 when N=3, and D=-3,-4 when N=4.
Gangl, Herbert   +5 more
core  

Modular forms and elliptic curves over the cubic field of discriminant -23

open access: yes, 2012
Let F be the cubic field of discriminant -23 and let O be its ring of integers. By explicitly computing cohomology of congruence subgroups of GL(2,O), we computationally investigate modularity of elliptic curves over F.Comment: Incorporated referee's ...
Gunnells, Paul E., Yasaki, Dan
core  

A table of elliptic curves over the cubic field of discriminant -23

open access: yes, 2014
Let F be the cubic field of discriminant -23 and O its ring of integers. Let Gamma be the arithmetic group GL_2 (O), and for any ideal n subset O let Gamma_0 (n) be the congruence subgroup of level n.
Donnelly, Steve   +3 more
core  

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