The Simultaneity or Coincidence Sign
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The Simultaneity or Coincidence Sign

Friends, sometimes I miss an appropriate sign to unite values of certain variable elements in time, and express when these values occur in different measurement positions.
For this we can understand that two (or more) values or elements can be referenced through the concept of simultaneity:
"Two elements (A,B) are simultaneous (<>) when the element or value of A occurs at point B, and vice versa"

Reasoning:
Most of the values of the elements and parameters tend to vary in time and space in the different positions in which they are measured.
For this reason, it is necessary to promote a formula or sign that exposes and unites the value of each element with respect to those different positions in which they are measured.

For example:

1.- The momentum of a moving particle tends to vary and be different at each point of its journey.
Therefore we can put that the value or momentum of A (p) will be given in the position B (x).... p <> x

2.- At time t, two events will occur in different positions (two lightning strikes), and we will put (x, x') <> t

3.- (a,b,g) <> (A,B)(t): The elements (a,b,g) have belonged to or been simultaneous in the sets A and B at time (t)
For example, the element (Juan ) had dual Spanish (S) and French (F) nationality in the year 1975......
(j) <> (S,F)(1975)

4.- The bus (b) arrived and stopped at (P26) at 4.30'
(b) <> (P26)(4.30')

5.- Juan (j) and Pedro (p) met at the bar (B) at 12.25'
(j,p) <> (B)(12.25)

6.- If we launch a rocket (c) to the moon, it will be 30 km (x= space or place) high in 2 minutes.
(c) <> (30 km)(+2')*
--- * When we use the time parameter, and when it is convenient to do so, we can express it in past, present and future using the plus and minus signs (-2, 2, +2)

* The simultaneity sign <> is synonymous and has the character and meaning of coincidence: Simultaneity and coincidence in values, times, places, etc.
Therefore it has a meaning and extensive application, for example:
--- y = x^2; (y <> x^2); here (y) have coincidence or simultaneity with (x^2)
--- p <> x, here the momentum (p) is fulfilled, has simultaneity or is coincident in the point or situation (x).
--- (j) <> (B)(t) here the element (j) belongs to, has simultaneity or is coincident in the set (B) and in time (t).
etc.