https://en.wikipedia.org/wiki/G%C3%B6del_numbering?wprov=sfti1

The nomenclature “…’ is due to the mathematician Gödel

]]>I am sorry,i couldn’t figure this Gode…

]]>Two mass points a and b (with large difference of mass) are in motion of two-body problem (a large, b small). One picture is in outer space, and the knot of a,b is gravity (b is in a circular motion). The other picture is on a plane (no friction), and the knot is tension of a string (the mass of the string is zero). In the two pictures, the centrifugal force of b is a vector that is on the extension line of a,b. The reaction is gravity in one picture and tension of the string in the other picture. Where and how is the centripetal force?

Tension of the string between a and b is constant. Gravity is not constant.

]]>The propagation of gravity will be done in an instant. For this, here are two reasons. One reason is that two-body problem, many-body problem are true for celestial bodies. The other reason is that the whole solar system is in an uniform linear motion and planets are in elliptical revolution on their revolution planes.9

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