4 papers
Weak Topologies on Toposes
Zeinab Khanjanzadeh, Ali Madanshekaf
This paper deals with the notion of weak Lawvere-Tierney topology on a topos. Our motivation to study such a notion is based on the observation that the composition of two Lawvere-…
Action preserving (weak) topologies on the category of presheaves
Zeinab Khanjanzadeh, Ali Madanshekaf
Let be a finitely complete small category. In this paper, first we construct two weak (Lawvere-Tierney) topologies on the category of presheaves. One of them is estab…
Characterization of Pomonoids by Properties of Generators
Setareh Irannezhad, Ali Madanshekaf
The study of flatness properties of ordered monoids acting on posets was initiated by S.M. Fakhruddin in the 1980's. Although there exist many papers which investigate various prop…
On the Generators in the Category of Actions of Pomonoids on Posets and its Slices
Farideh Farsad, Ali Madanshekaf
Let be a pomonoid, in this paper, {\bf Pos}-, the category of -posets and -poset maps, is considered. First, we characterize some pomonoids on which all projectives in…