The purpose of this paper is to introduce and discuss the concept of T-rough (prime, primary) ideal and T-rough fuzzy (prime, primary) ideal in a commutative ring . Our main aim in this paper is, generalization of theorems which have been proved in [6, 7, 11]. At first, T-rough sets introduced by Davvaz in [6]. By using the paper, we define a concept of T-rough ideal , T-rough quotient ideal an...

Recently, an overall trend towards increasing complexity of ontologies could be observed, not only in terms of domain modeling, where the complexity should correspond to the information to be modeled, but also as regards the addition of further information, which could be modeled as external resources to the domain model and linked to its relevant elements. This concerns the addition of termino...

in this paper we argue about knowledge management (km) and its implications for academic productivity with focus on models of changes in knowledge production posited by gibbons et al and community model of knowledge management, especially in a transitional society as iran.  based on the above argument, we have discussed the relationships between research and teaching productivity, briefly. beca...

In order to handle inconsistencies in ordinal and monotonic information systems, the Variable Consistency Dominance-based Rough Set Approach (VC-DRSA) has been proposed and successfully applied in real decision making. However, there exists an error spread of inconsistencies in VC-DRSA. In this paper, we firstly induce a strict-dominance relation into Variable-Precision Rough Sets (VPRS). Two n...

Dominance-based rough set introduced by Greco et al. is an extension of Pawlak’s classical rough set theory by using dominance relations in place of equivalence relations for approximating sets of preference ordered decision classes satisfying upward and downward union properties. This paper introduces the concept of indexed blocks for representing dominance-based approximation spaces. Indexed ...

This paper studies equilibrium selection based on a class of perfect foresight dynamics and relates it to the notion of p-dominance. A continuum of rational players are repeatedly and randomly matched to play a symmetric n × n game. There are frictions: opportunities to revise actions follow independent Poisson processes. The dynamics has stationary states, each of which corresponds to a Nash e...

The paper shows the contribution that two different multiple criteria decision aiding (MCDA) methods could provide in the field of strategic decisions and urban and territorial planning. In particular, the analytic network process and the dominance-based rough set approach have been considered and discussed in the work with reference to their role in supporting such decision-making processes, t...

Customer churn means the loss of existing customers to a competitor. Accurately predicting customer behavior may help firms to minimize this loss by proactively building a lasting relationship with their customers. In this paper, the application of the factor analysis and the Variable Consistency Dominance-based Rough Set Approach (VC-DRSA) in the customer relationship management (CRM) of the a...

The dominance–based rough set approach plays an important role in the development of the rough set theory. It can be used to express the inconsistencies coming from consideration of the preference–ordered domains of the attributes. The purpose of this paper is to further generalize the dominance–based rough set model to fuzzy environment. The constructive approach is used to define the intuitio...