





Monoid and Topological Groupoid
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Here we introduce some new results which are relative to the concept of topological monoid-groupoid and prove that the category of topological monoid coverings of X is equivalent to the category covering groupoids of the monoid-groupoid π1(X). Also, it is shown that the monoid structure of monoid-groupoid lifts to a universal covering groupoid.
Keywords
Fundamental Groupoid, Covering Groupoids, Topological Groupoid, Topological Semigroup and Monoid.
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