Algebraic Topology : On some results of category for source proper groupoid space

Some Results Topoi by Topological Groupoids

“…is the continuous map that is a local homeomorphism [2]. Let be the topological space with its collection for open subsets becomes the post category when inclusions are made in a specific order, with arrows denoting only the inclusions that are part of the U subset of the V [9]. The stack or presheaf over is the contravariant functor from to collection.…”