A smooth connected projective complex variety has large fundamental group when, for every positive-dimensional
closed irreducible subvariety
, the image of
is infinite.
Here
is the normalization. This is equivalent to the universal
cover containing no positive-dimensional compact complex analytic subvariety.
It imposes a condition on all subvarieties, not only on the size of
itself.
Large Fundamental Group
See also
Abelian Variety, Fundamental Group, Projective Variety, Shafarevich Holomorphic Convexity Conjecture, Universal CoverExplore with Wolfram|Alpha
References
Deng, Y. "Topology, Hyperbolicity, and the Shafarevich Conjecture for Complex Algebraic Varieties." 30 Dec 2025. https://arxiv.org/abs/2512.24458.Cite this as:
Weisstein, Eric W. "Large Fundamental Group." From MathWorld--A Wolfram Resource. https://mathworld.wolfram.com/LargeFundamentalGroup.html