Let X' be the toroidal compactification of the quotient of the complex 2-ball by a torsion free lattice G of SU(2,1). We say that X'is co-abelian if there is an abelian surface, birational to X'. The present work can be viewed as an illustration for the presence of a plenty of...
Let B be the complex n-dimensional ball and X' be the toroidal compactification of a quotient B/G by a torsion free lattice G of SU(n,1). For an arbitrary G-rational boundary point p, denote by U(p) the commutant of the unipotent radical of the stabilizer of p in SU(n,1) and...
A subgroup ofGis discrete if and only if it acts onXwith finite cell stabilizers. A discrete subgroupis called alatticeifhas finite Haar measure, and a lattice iscocompactifis compact. Note that it may happen thatGis discrete, in which case the theory of its lattices is trivial. Lattices ...
To introduce the concept of singular interval, we use the symmetric idea of torsion theories, that is the torsion class determines the torsionfree class and vice versa, thus to introduce nonsingular intervals over an upper-continuous modular complete lattice, (a.k.a idiom, a.k.a modular pre...
If Γ is the fundamental group of a primitive manifold X, then Γ fits into a short exact sequence 0-*·Μ—*·Γ-*·Η—* 1, where Η is the finite holonomy group of X and M is a faithful integral representation of H (an H-lattice). Furthermore Γ is torsion-free and the cent...
The first isa metabelian residually torsion-free-nilpotent groupGGF=Rhaving free central extensionF=½F;Rwhich is not residually nilpotent and the second is a centrally ordered group thatdoes not belong to the variety of lattice-ordered groups generated by all nilpotent lattice-ordered groups....
The aim of this paper is to show that the theory of free lattice-ordered groups developed by E. C. Weinberg in the abelian case can be generalized to modules over a totally ordered Ore domain . The main result is that for every torsion-f... ...
torsion-free partZiegler spectrumDedekind domainsWe study the R-torsion-free part of the Ziegler spectrum of an order Λ over a Dedekind domain R.We underline and comment on the role of lattices over Λ.We describe the torsion-free part of the spectrum when Λ is of finite lattice ...
The lattice spins are calculated and an example of the rotation field is displayed in Euler space. The orientation stability map (OSM) corresponding to a rate sensitivity of m = 0.125 is presented for the free end torsion of a thin walled tube. The effect of rate sensitivity on the ...
The invention relates to a structure having a torsion lattice girder for a parabolic trough solar collector, consisting of: a torsion girder (23) having a square cross-section, which in turn includes: frames (1) at both ends that transmit torque, enable connection with another adjacent ...