Abstract
Previously proposed field equations for the fieldφ which maps points in space-time to points on the two-sphere are derived from a suitable Lagrangian. The original conjecture that this theory may be the nonlinear theory of electrodynamics which has charge quantization as a topological property is supported by this result. Problems with this interpretation are indicated.
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Pisello, D.M. Unified field theory with homotopic charge. Int J Theor Phys 17, 143–147 (1978). https://doi.org/10.1007/BF00686955
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DOI: https://doi.org/10.1007/BF00686955