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gr-qc2026
Gravitational entropy in Petrov Type I spacetimes
Maharshi Sarma, Sebastián Nájera, Roberto A. Sussman
The gravitational entropy proposal of Clifton, Ellis and Tavakol (CET) is based on an effective energy momentum tensor formed by the algebraic decomposition of the 4th order Bel-Ro…
gr-qc2026
Peculiar velocity fields from analytic solutions of General Relativity
Roberto A. Sussman, Sebastián Nájera, Fernando A. Pizaña +1
Peculiar velocities are analyzed through cosmological perturbations in the Newtonian longitudinal gauge characterized by irrotational shear-free congruences in an Eulerian frame. W…