214 citations · 1.8k across the 77 of their papers we have counts for
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A variational formulation of relativistic hydrodynamics
Nikodem J. Poplawski
We combine Taub's and Ray's variational approaches to relativistic hydrodynamics of perfect fluids into another simple formulation.
Variational formulation of Eisenhart's unified theory
Nikodem J. Poplawski
Eisenhart's classical unified field theory is based on a non-Riemannian affine connection related to the covariant derivative of the electromagnetic field tensor. The sourceless fi…
Geometrical formulation of classical electromagnetism
Nikodem J. Poplawski
A general affine connection has enough degrees of freedom to describe the classical gravitational and electromagnetic fields in the metric-affine formulation of gravity. The gravit…
Geometrization of electromagnetism in tetrad-spin-connection gravity
Nikodem J. Poplawski
The metric-affine Lagrangian of Ponomarev and Obukhov for the unified gravitational and electromagnetic field is linear in the Ricci scalar and quadratic in the tensor of homotheti…