A topological groupoid over 
is a groupoid 
such that 
and 
are topological spaces
and 
,
and multiplication are continuous maps. Here, 
and 
are maps from 
onto 
.
Topological Groupoid
See also
Groupoid, Topological SpaceExplore with Wolfram|Alpha
References
Weinstein, A. "Groupoids: Unifying Internal and External Symmetry." Not. Amer. Math. Soc. 43, 744-752, 1996.Referenced on Wolfram|Alpha
Topological GroupoidCite this as:
Weisstein, Eric W. "Topological Groupoid." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/TopologicalGroupoid.html