Haken

For Wolfgang Haken, who studied these manifolds.

Haken (not comparable)

1. (topology, of a 3-manifold) Irreducible, compact, and containing a non-∂-parallel incompressible surface (besides a sphere or disk).

• Hanke, kaneh, khaen

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.

• IPA^(key): /ˈhaːkŋ̩/, /ˈhaːkən/

• Audio (Austria)

  (file)

• Audio

  (file)

• Homophone: haken

Haken m (genitive Hakens, plural Haken, diminutive Häkchen n)

1. hook
2. catch, hitch (a concealed difficulty, especially in a deal or negotiation)
3. checkmark

• (checkmark): Häkchen

• Haken in Duden online