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knot genus

См. также в других словарях:

  • Knot invariant — In the mathematical field of knot theory, a knot invariant is a quantity (in a broad sense) defined for each knot which is the same for equivalent knots. The equivalence is often given by ambient isotopy but can be given by homeomorphism. Some… …   Wikipedia

  • knot — knot1 [nät] n. [ME knotte < OE cnotta, akin to Du knot, Swed knut, Ger knoten < IE * gn eu t < base * gen , to press together > KNOB, KNEAD] 1. a lump or knob in a thread, cord, etc., formed by passing one free end through a loop and… …   English World dictionary

  • knot — knot1 knotless, adj. knotlike, adj. /not/, n., v., knotted, knotting. n. 1. an interlacing, twining, looping, etc., of a cord, rope, or the like, drawn tight into a knob or lump, for fastening, binding, or connecting two cords together or a cord… …   Universalium

  • Genus (mathematics) — In mathematics, genus has a few different, but closely related, meanings:TopologyOrientable surfaceThe genus of a connected, orientable surface is an integer representing the maximum number of cuttings along closed simple curves without rendering …   Wikipedia

  • knot — Ⅰ. knot1 (nŏt) n. 1. a) A compact intersection of interlaced material, such as cord, ribbon, or rope. b) A fastening made by tying together lengths of material, such as rope, in a prescribed way. 2. A decorative bow of ribbon, fabric, or braid. 3 …   Word Histories

  • knot — I. /nɒt / (say not) noun 1. an interlacement of a cord, rope, or the like, drawn tight into a lump or knob, as for fastening two cords, etc., together or to something else. 2. a piece of ribbon or similar material tied or folded upon itself and… …  

  • Genus-2 surface — A genus 2 surface. In mathematics, a genus 2 surface (also known as a double torus or two holed torus) is a surface formed by the connected sum of two tori. That is to say, from each of two tori the interior of a disk is removed, and the… …   Wikipedia

  • genus Calidris — noun a genus of Scolopacidae • Syn: ↑Calidris • Hypernyms: ↑bird genus • Member Holonyms: ↑Scolopacidae, ↑family Scolopacidae • Member Meronyms: ↑ …   Useful english dictionary

  • Mutation (knot theory) — The Kinoshita–Terasaka knot and the Conway knot respectively, and how they are related by mutation. In the mathematical field of knot theory, a mutation is an operation on a knot that can produce different knots. Suppose K is a knot given in the… …   Wikipedia

  • List of knot theory topics — Knot theory is the study of mathematical knots. While inspired by knots which appear in daily life in shoelaces and rope, a mathematician s knot differs in that the ends are joined together so that it cannot be undone. In precise mathematical… …   Wikipedia

  • Root-knot nematode — Larva of root knot nematode, Meloidogyne incognita, magnified 500×, shown here penetrating a tomato root Scientific classification Kingdom …   Wikipedia

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