For Wolfgang Haken, who studied these manifolds.
Haken (not comparable)
- (topology, of a 3-manifold) Irreducible, compact, and containing a non-∂-parallel incompressible surface (besides a sphere or disk).
From Middle High German hāke, from Old High German hāggo, hācko, hāko, from Proto-Germanic *hakô, from Proto-Indo-European *keg-, *keng- (“peg; hook”). One of the rare words with a long vowel followed by an original geminate, which was later simplified. Cognate with Dutch haak. Further related with Dutch hoek, English hook.
- (checkmark): Häkchen
- “Haken” in Duden online