we show that the category of convergence approach spaces is a simultaneously reective and coreective subcategory of the category of latticevalued limit spaces. further we study the preservation of diagonal conditions, which characterize approach spaces. it is shown that the category of preapproach spaces is a simultaneously reective and coreective subcategory of the category of lattice-valued p...

urbanisation is still one of the social themes in developing countries. in china, the rapid process of urbanisation and economic growth bring to people not only more opportunities for creating new life and pursuing happiness, but also the challenge to face various and complex social, economical and environmental problems. among them some are outstanding, like the shrinking plowland devoured by ...

it is conventional to say that islamic built environment is introversive. in urban and architectural studies, this term is made equal to a formal organization of voids and solids in which voids are surrounded by an impermeable mass, and then some theoretical reasoning is attached to this formal system. here we are dealing with the issue in an alternative way; instead of finding interpretations ...

in this paper we obtain lower and upper estimates for the essential norms of generalized composition operators from weighted dirichlet spaces or bloch type spaces to $q_k$ type spaces.

This article presents a detailed formal approach to concepts and concept combination. Sense generation is a competence-level theory that attempts to respect constraints from the various cognitive sciences, and postulates “quasi-classical” conceptual structures where ottributes receive only one value (but are defeasible and so do not represent necessary and sufficient conditions on category memb...

in this paper, we introduce a method by which we can find a close connection between the set of prime $z$-ideals of $c(x)$ and the same of $c(y)$, for some special subset $y$ of $x$. for instance, if $y=coz(f)$ for some $fin c(x)$, then there exists a one-to-one correspondence between the set of prime $z$-ideals of $c(y)$ and the set of prime $z$-ideals of $c(x)$ not containing $f$. moreover, c...