The canonical generator of the nonvanishing homology group on a topological manifold.
Fundamental Class
See also
Chern Number, Pontryagin Number, Stiefel-Whitney NumberExplore with Wolfram|Alpha
Cite this as:
Weisstein, Eric W. "Fundamental Class." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/FundamentalClass.html