Protorus
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In mathematics, a protorus is a compact connected topological abelian group. Equivalently, it is a projective limit of tori (products of a finite number of copies of the circle group), or the Pontryagin dual of a discrete torsion-free abelian group.
Some examples of protori are given by solenoid groups.
See also
- Duocylinder - Cartesian product of two disks
- Proprism