Image sampling with quasicrystals.
Independent generators for congruence subgroups of Hecke groups.
Inequalities for Möbius transformations and discrete groups.
Infinite classes of simple and multiple antisymmetry four-dimensional point groups.
Infinite dimensional general linear groups have finite width.
Infinite dimensional linear groups with many G - invariant subspaces
Let F be a field, A be a vector space over F, GL(F, A) be the group of all automorphisms of the vector space A. A subspace B of A is called nearly G-invariant, if dimF(BFG/B) is finite. A subspace B is called almost G-invariant, if dim F(B/Core G(B)) is finite. In the current article, we study linear groups G such that every subspace of A is either nearly G-invariant or almost G-invariant in the case when G is a soluble p-group where p = char F.
Integral quadratic forms : applications to algebraic geometry
Invariants of a class of transformation groups.
Involutions of compact Klein surfaces.