We know from school geometry that an ellipse is a plane curve surrounding two focal points, such for all points on the curve, the sum of the two distances to the focal points is a constant.

From the same source we know that a hyperbola is a set of points, such that for any point of the set, the absolute difference of the distances to two fixed focal points (the foci) is constant.

On the other hand, the creators of Special Relativity Theory (SRT) use the concepts of the ellipsoid of revolution and the hyperboloid of revolution (or Minkowski’s one-dimensional hyperbola) as basic geometric constructions describing, in their opinion, the physical relationships between spatial segments, into which a massive body moves in a fixed amount of time and spatial distances travelled in the same time by electromagnetic signals, exchanged between physical objects. At the same time, SRT advocates persistently avoid any mention of foci. (To be fair to you, William Moreau, "Wave front relativity", American Journal of Physics vol. 62, no. 5 (1 May 1994), pages 426-429 attempt to correct the situation by introducing an extended ellipse into consideration (instead of Einstein’s compressed one) but ignoring another important feature of electromagnetic radiation).

Is ignoring the notion of focal points of ellipsoids and hyperboloids of revolution in SRT an unfortunate accident, or does it reflects the fact that neither the ellipsoid of revolution nor the one-dimensional hyperbola have the slightest relationship to solving the problems that the relativism fathers set before themselves?

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