(−2,3,7) pretzel knot - definizione. Che cos'è (−2,3,7) pretzel knot
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Cosa (chi) è (−2,3,7) pretzel knot - definizione

TYPE OF MATHEMATICAL KNOT
Fintushel-Stern knot; (-2, 3, 7) pretzel knot; Fintushel–Stern knot; 12n242 knot
  • A [[pretzel]] (−2,3,7) pretzel knot.

(−2,3,7) pretzel knot         
In geometric topology, a branch of mathematics, the (−2, 3, 7) pretzel knot, sometimes called the Fintushel–Stern knot (after Ron Fintushel and Ronald J. Stern), is an important example of a pretzel knot which exhibits various interesting phenomena under three-dimensional and four-dimensional surgery constructions.
Nodation         
  • Alexander]] cuts the [[Gordian Knot]]'', by [[Jean-Simon Berthélemy]] (1743–1812)
  • #27 End #29 Bight #28 Standing
  • [[Bowline]]
  • #34 Cross #35 Elbow #36 Round turn
  • A: open loop, B: closed loop, C: turn, D: round turn, E: two round turns.
  • Gordian Knot statue (1990)
  • Elbe 1 (ship, 1965)]]
  • [[Magimagi]] [[sennit]] of [[Fiji]] around wooden ceiling posts.
  • Sailors learning knots and [[ropework]] in the early 20th century
  • Sailor bag with different knots
  • Blackfoot]] "Teton" tipi tie<ref>Anthropological Papers of the American Museum of Natural History. Material culture of the Blackfoot Indians. 1910.</ref>
METHOD OF FASTENING OR SECURING LINEAR MATERIAL
Working end; List of trick knots; Knots and Ropework; Knot tying; Knotwork; List of coil knots; Standing part; Coil knots; Trick knot; Nodation; Capsize (knot); Knot component; Knot components; End (knot); Standing part (knot); History of knots; Knot history; History of knotting; Knot strength; Knot efficiency; Spill (knot); Slipping (knot); Sliding (knot); 🪢
·noun Act of making a knot, or state of being knotted.
knotwork         
  • Alexander]] cuts the [[Gordian Knot]]'', by [[Jean-Simon Berthélemy]] (1743–1812)
  • #27 End #29 Bight #28 Standing
  • [[Bowline]]
  • #34 Cross #35 Elbow #36 Round turn
  • A: open loop, B: closed loop, C: turn, D: round turn, E: two round turns.
  • Gordian Knot statue (1990)
  • Elbe 1 (ship, 1965)]]
  • [[Magimagi]] [[sennit]] of [[Fiji]] around wooden ceiling posts.
  • Sailors learning knots and [[ropework]] in the early 20th century
  • Sailor bag with different knots
  • Blackfoot]] "Teton" tipi tie<ref>Anthropological Papers of the American Museum of Natural History. Material culture of the Blackfoot Indians. 1910.</ref>
METHOD OF FASTENING OR SECURING LINEAR MATERIAL
Working end; List of trick knots; Knots and Ropework; Knot tying; Knotwork; List of coil knots; Standing part; Coil knots; Trick knot; Nodation; Capsize (knot); Knot component; Knot components; End (knot); Standing part (knot); History of knots; Knot history; History of knotting; Knot strength; Knot efficiency; Spill (knot); Slipping (knot); Sliding (knot); 🪢
¦ noun ornamental work consisting of or representing intertwined cords.

Wikipedia

(−2,3,7) pretzel knot

In geometric topology, a branch of mathematics, the (−2, 3, 7) pretzel knot, sometimes called the Fintushel–Stern knot (after Ron Fintushel and Ronald J. Stern), is an important example of a pretzel knot which exhibits various interesting phenomena under three-dimensional and four-dimensional surgery constructions.