In this article the notion of quasi right factorization structure in a category X is given. The main result is a one to one correspondence between certain classes of quasi right factorization structures and 2-reflective subobjects of a predefined object in Lax(PrOrdX op ). Also a characterization of quasi right factorization structures in terms of images is given. As an application, the closure...

It was shown by Chinburg and Reid that there exist closed hyperbolic 3-manifolds in which all closed geodesics are simple. Subsequently, Basmajian and Wolpert showed that almost all quasi-Fuchsian 3-manifolds have all closed geodesics simple and disjoint. The natural conjecture arose that the Chinburg-Reid examples also had disjoint geodesics. Here we show that this conjecture is both almost tr...

we prove that the class of profinite groups $g$ that have a factorization $g=ab$‎ ‎with $a$ and $b$ abelian closed subgroups‎, ‎is closed under taking inverse limits‎ ‎of surjective inverse systems‎. ‎this is a generalization of a recent result by k. h. hofmann and f. g. russo‎. ‎as an application we reprove their generalization of iwasawa's structure theorem for‎ ‎quasihamiltonian pro-$p$...

Security communication is an important requirement in many sensor network applications. A new kind of pairwise key establishment scheme based on hierarchical hypercube model H(k,u,m,v,n) for clustersdeployed sensor networks distribution model is presented. Theoretic analysis and experimental figures show that the new pairwise key model has better performance and provides higher possibilities fo...

Let r > 1 be an integer. An h-hypergraph H is said to be r-quasi-linear (linear for r = 1) if any two edges of H intersect in 0 or r vertices. In this paper it is shown that r-quasi-linear paths P h,r m of length m > 1 and cycles C h,r m of length m > 3 are chromatically unique in the set of h-uniform r-quasi-linear hypergraphs provided r > 2 and h > 3r − 1.

In this paper a novel transmission scheme that combines non-orthogonal multiple access (NOMA) and multi-carrier index keying (MCIK) is proposed. This scheme is proposed as a mechanism to enable multiple access for dense wireless device-to-device (D2D) systems that require high energy efficiency and effective interference management. The performance of the proposed scheme is analyzed in terms of...

Abstract To develop a method for determining the parameters of final equation state (EOS) detonation products aluminized explosives, an explosion quasi-static pressure measurement system in closed containers with large mass-to-volume ratio is developed. The influence domestic and foreign typical charge piezoelectric sensors, sensor buffer adjustment structures, container tightness, grounding op...

We prove an a priori error estimate for the hp-version of the boundary element method with hypersingular operators on piecewise plane open or closed surfaces. The underlying meshes are supposed to be quasi-uniform. The solutions of problems on polyhedral or piecewise plane open surfaces exhibit typical singularities which limit the convergence rate of the boundary element method. On closed surf...

A semi-analytical method is proposed to calculate stochastic quasi-periodic responses of limit cycles in non-equilibrium dynamical systems excited by periodic forces and weak random fluctuations, approximately. First, a kind of 1/N-stroboscopic map is introduced to discretize the quasi-periodic torus into closed curves, which are then approximated by periodic points. Using a stochastic sensitiv...

The title compound, C15H12N2O4S, is V-shaped with the isoindoline ring system (r.m.s. deviation = 0.006 Å) inclined to the benzene ring by 84.27 (13)°. In the crystal, inversion dimers are formed via pairwise N-H⋯O hydrogen bonds. These dimers associate further into corrugated ribbons, via pairwise N-H⋯O and C-H⋯O hydrogen bonds, propagating along the a-axis direction and lying parallel to (001).