$\Bbb R^3$ minus $k$ lines that all go through a point can be regarded as a sphere minus $2k$ points, and if these lines are disjoint then $\Bbb R^3$ minus these lines can be regarded as $\Bbb R^2$ minus k points, if there are three lines such that it form a triangle then what is the fundamental group of $\Bbb R^3$ minus these lines?
2026-04-05 14:46:19.1775400379
Fundamental group of $R^3$ minus three lines that form a triangle
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