A Kinematical Interpretation of Electromagnetism

Geometric Interpretation of Electromagnetism in a Gravitational Theory with Space–Time Torsion

A complete geometric unification of gravity and electromagnetism is proposed by considering two aspects of torsion: its relation to spin established in Einstein–Cartan theory and the possible interpretation of the torsion trace as the electromagnetic potential. Starting with a Lagrangian built of Dirac spinors, orthonormal tetrads, and a complex rather than a real linear connection we define an...

Geometric Interpretation of Electromagnetism in a Gravitational Theory with Torsion and Spinorial Matter

KEPLER’S EQUATIONS a kinematical deduction

Kepler’s equations are considered as central to Celestial Mechanics since their solutions permit ’to find the position of a body for a given time’. To obtain a kinematical deduction of them, only one new concept is introduced with the name of ”maccel”. By assuming the simultaneous conservation of the maccel and of the angular momentum, it is shown that the position vector always describes a con...

A Brief History of Electromagnetism

Understanding the connections between magnetism and electricity and exploiting that understanding for technological innovation dominated science in the nineteenth century, and yet no one saw it coming. In the index to Butterfield’s classic history of the scientific revolution [3], which he locates roughly from 1300 to 1800, the word “electricity” does not appear. Nobody in 1800 could have imagi...

Kinematical Covariance and Dynamical

We consider a net of algebras, kinematically covariant under general diieomor-phisms. A physical state induces dynamical relations, encoded by an associated net of ideals, annihilated by this state. Hence the related net of observables is in general not covariant under the full kinematical group of diieomorphisms, but only under its subgroup of dynamical symmetries. We comment on the implicatio...