In this paper we introduce two notions —systems of fibrant objects and fibration structures— which will allow us to associate to a bicategory B a homotopy bicategory Ho(B) in such a way that Ho(B) is the universal way to add pseudo-inverses to weak equivalences in B. Furthermore, Ho(B) is locally small when B is and Ho(B) is a 2-category when B is. We thereby resolve two of the problems with kn...

fractionation studies on the sediment samples provide valuable information on the nature of the metals bound to the sediments. thirty three sediment samples of river adyar were collected during two seasons and speciation study was carried out. the industrial and domestic effluents are directed into the river course at many points in the middle and lower of the adyar river. to ascertain the exte...

‎This paper develops a basic theory of $H$-groups‎. ‎We‎ ‎introduce a special quotient of $H$-groups and‎ ‎extend some algebraic constructions of topological groups to the category‎ ‎of H-groups and H-maps and then present a functor from this category to the category of quasitopological groups‎.

This study aims to obtain a description of the application guided discovery learning model improve student outcomes in matter dividing fractions VA class SDN 5 Palu. type research is Classroom Action Research (PTK) which refers design Kemmis and Mc. Taggart, namely (1) planning, (2) implementing actions, (3) observation, (4) reflection. The subjects this were all students at Palu for 2022/2023 ...

In this article, we introduce the concept of co-covering which is the dual of covering concept. Then, we prove several theorems being similar to the theorems that have been de-veloped for the covering concept. For example, we provide the lifting criterion for co-coverings of a topological space X, which helps us to classify them by subgroups of the group of all homeomorphisms of X.

The goal would be achieved in this activity was increasing the ability and understanding of 5th Grade students at SD Inp 12/79 Biru II Watampone converting units performing arithmetic operations related to these ones. methods used service were lecture simulation methods. results showed that level (trainees) after attending training good category weakness about how operate decimal fractions as w...

‎in this paper first we define the morphism between geometric spaces in two different types‎. ‎we construct two categories of $uu$ and $l$ from geometric spaces then investigate some properties of the two categories‎, ‎for instance $uu$ is topological‎. ‎the relation between hypergroups and geometric spaces is studied‎. ‎by constructing the category $qh$ of $h_{v}$-groups we answer the question...