tangle diagram造句

• This means their tangle diagrams consist of 2 arcs and 4 points on the edge of the diagram; furthermore, they are built up from rational tangles using the Conway operations.
• The four endpoints of the arcs on the boundary circle of a tangle diagram are usually referred as NE, NW, SW, SE, with the symbols referring to the compass directions.
• Let k be a non-negative integer and S _ k denote the set of all isotopic types of tangle diagrams, with 2k ends, having no crossing points and no closed components ( smoothings ).
• An arbitrary tangle diagram of a rational tangle may look very complicated, but there is always a diagram of a particular simple form : start with a tangle diagram consisting of two horizontal ( vertical ) arcs; add a " twist ", i . e . a single crossing by switching the NE and SE endpoints ( SW and SE endpoints ); continue by adding more twists using either the NE and SE endpoints or the SW and SE endpoints.
• An arbitrary tangle diagram of a rational tangle may look very complicated, but there is always a diagram of a particular simple form : start with a tangle diagram consisting of two horizontal ( vertical ) arcs; add a " twist ", i . e . a single crossing by switching the NE and SE endpoints ( SW and SE endpoints ); continue by adding more twists using either the NE and SE endpoints or the SW and SE endpoints.