Recent work in the ideal theory of commutative rings and that of C*-algebra is unified and generalized by first noting that these spaces are Lawson-closed subspaces of continuous lattices, equipped with the restriction of the lower topology. These topologies were first studied by Nachbin in the late 1940’s (in [32]), as the topologies of those open sets in a compact Hausdorff space which are up...

We show that the Vapnik-Chervonenkis dimension of Boolean mono-mials over n variables is at most n for all n 2. It follows that the VC-dimension is determined exactly and is, except for n = 1, equal to the VC-dimension of the proper subclass of monotone monomials.

We investigate the following conjecture of Hehui Wu: for every tournament S, the class of S-free tournaments has bounded domination number. We show that the conjecture is false in general, but true when S is 2-colourable (that is, its vertex set can be partitioned into two transitive sets); the latter follows by a direct application of VC-dimension. Our goal is to go beyond this; we give a non-...

abstract the attrition of anterior teeth leads to the loss of efficient anterior guidance, which protects posterior teeth from wear during lateral excursions. this clinical report describes a 48-year-old man with diagonal tooth wear and posterior mandibular tooth loss. the clinical diagnosis was based on a complete oral examination, photos, functional analysis of lateral excursion movements, ge...

different discrete models of population dynamics of certain insects have been investigated under various feasible conditions within the framework of nonlinear dynamics. evolutionary phenomena are discussed through bifurcation analysis leading to chaos. some tools of nonlinear dynamics, such as lyapunov characteristic exponents (lce), lyapunov numbers, correlation dimension, etc. are calculated ...

organizational health is a new concept in organizations that includes the organizations ability to perform their duties effectively. today organizations especially hospitals, should have a high organizational health to increase productivity. this study reviewed organizational health in masjed soleiman’s hospitals. this cross - sectional study was conducted in masjed soleiman’s hospitals. the st...