TL;DR
This paper revisits Kaluza's 1921 unification approach, translating and formatting his original work on 5-dimensional spacetime to clarify its historical and scientific significance in unifying gravity and electromagnetism.
Contribution
It provides a revised, accurately formatted translation of Kaluza's original paper, restoring original notation and offering clearer insight into early unification theories.
Findings
Restores Kaluza's original notation and formatting.
Clarifies historical context of unification approach.
Highlights the foundational role of 5D spacetime in physics.
Abstract
Revised translation of Kaluza's historic 1921 paper, "Zum Unit\"atsproblem der Physik," on 5-dimensional spacetime, used to unify gravity and electromagnetism. This version is based, in part, on a 1984 translation provided by T. Muta, but revised and formatted using LaTeX to closely match the original paper in appearance and pagination. Kaluza's original notation is restored.
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