## Two-World Background of Special Relativity. Part II

**Authors:** Akindele O. J. Adekugbe

The two-world background of the Special Theory of Relativity started in part one of
this article is continued in this second part. Four-dimensional inversion is shown to be
a special Lorentz transformation that transforms the positive spacetime coordinates of a
frame of reference in the positive universe into the negative spacetime coordinates of the
symmetry-partner frame of reference in the negative universe in the two-world picture,
contrary to the conclusion that four-dimensional inversion is impossible as actual transformation
of the coordinates of a frame of reference in the existing one-world picture.
By starting with the negative spacetime dimensions in the negative universe derived in
part one, the signs of mass and other physical parameters and physical constants in the
negative universe are derived by application of the symmetry of laws between the positive
and negative universes. The invariance of natural laws in the negative universe is
demonstrated. The derived negative sign of mass in the negative universe is a conclusion
of over a century-old effort towards the development of the concept of negative
mass in physics.

**Comments:** 19 pages, 13 pages, published in Progress in Physics, 2010, vol.1, 49-61

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### Submission history

[v1] 19 Feb 2010

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