A subset S of a paratopological group G is suitable set for G, if discrete subspace $$S\cup \{e\}$$ ∪ { e } closed, and the subgroup $$\langle S\rangle $$ ⟨ ⟩ generated by dense in G. Suitable sets topological groups were studied many authors. The aim present paper to provide start-up general investigation groups, looking what extent we can (by proving propositions) or cannot constructing examp...

In this paper we introduce the notion of a suitable semantics which is very similar to the notion of a well behaved semantics. While well-behaved semantics ask for the relevance property, suitable semantics ask for ratio-nality. We argue that suitable semantics can be more appropiated than well-behaved semantics in some cases. We also introduce CSC, which is a suitable semantics deened via a co...

The purpose of this study is to understand reference libraries of Isfahan University of Medical Sciences. The reference part of libraries was examined from 2008 to 2011. We found that the number of reference librarians should be increased. We found graduate students are the main patrons. We understand interaction with patrons is very important. This study will be helpful for specialist, librari...

A subset S of a topological group G is said to be a suitable set if (a) it has the discrete topology, (b) it is a closed subset of G \ {l}, and (c) the subgroup generated by S is dense in G. K.H. Hoffmann and S.A. Morris proved that every locally compact group has a suitable set. In this paper it is proved that every metrizable topological group and every countable Hausdorff topological group h...

Biodegradation of five herbicides, two acetanilides (propanil and propachlor), and three phenylureas (diuron, monuron, and fenuron) was analyzed in samples of river water during a period of 6-8 weeks. Concentrations of 0.2-5.0 mg/liter of the herbicides were used for biodegradation. Two types of river water samples with different numbers of microorganisms were collected from the Neris River: up...