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Off-diagonal solutions in Einsteingravity modeling f(R) gravity and dynamical darkenergy vs Lambda CDM cosmology
Sergiu I. Vacaru
Modified gravity theories (MGTs) have long been studied as alternatives to general relativity (GR) and the standard Lambda CDM cosmological model. For example, exponential f(R) mod…
Nonassociative geometry of nonholonomic phase spaces with star R-flux string deformations and (non) symmetric metrics
Sergiu I. Vacaru, ElÅen Veli Veliev, LaurenÅ£iu Bubuianu
We elaborate on nonassociative differential geometry of phase spaces endowed with nonholonomic (non-integrable) distributions and frames, nonlinear and linear connections, symmetri…
Off-diagonal deformations of regular Schwarzschild black holes and general relativistic G. Perelman thermodynamics
Sergiu I. Vacaru, ElÅen Veli Veliev
We construct new classes of solutions describing generic off-diagonal deformations of regular Schwarzschild black holes (BHs) in general relativity (GR). Examples of such (primary)…
Inconsistencies of nonmetric Einstein-Dirac-Maxwell theories and a cure for geometric flows of f(Q) black ellipsoid, toroid and wormhole solutions
Sergiu I. Vacaru
Many papers on modified gravity theories (MGTs), and metric-affine geometry have been published. New classes of black hole (BH), wormhole (WH), and cosmological solutions involving…