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If ′ is a non-trivial knot in and if a compressing disc for intersects ′ in precisely one point, then is called a connect-sum. Another way to say this is that the pattern K ′ ∪ J {\displaystyle K'\cup J} is the connect-sum of a non-trivial knot K ′ {\displaystyle K'} with a Hopf link.
To take point, walk point, be on point, or be a point man is to assume the first and most exposed position in a combat military formation, [1] that is, the leading soldier or unit advancing through hostile or unsecured territory. [2] [3] The term can be applied to infantry or mechanized columns. The soldier, vehicle, or unit on point is ...
The three points, object point, image point and optical centre, are always collinear. Another way to say this is that the line segments joining the object points with their image points are all concurrent at the optical centre.
A fly-over waypoint is a waypoint that must be crossed vertically by an aircraft. A fly-by waypoint is a waypoint that marks the intersection of two straight paths, with the transition from one path to another being made by the aircraft using a precisely calculated turn that "flies by" but does not vertically cross the waypoint.
In an inequality, the less-than sign and greater-than sign always "point" to the smaller number. Put another way, the "jaws" (the wider section of the symbol) always direct to the larger number. The less-than-sign is sometimes used to represent a total order , partial order or preorder .
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Live to fight another day (This saying comes from an English proverbial rhyme, "He who fights and runs away, may live to fight another day") Loose lips sink ships; Look before you leap; Love is blind – The Two Gentlemen of Verona, Act II, Scene 1 (1591) Love of money is the root of all evil [15] Love makes the world go around
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