Simultaneous expansion and rotation of shear-free universes in modified gravity
classification
🌀 gr-qc
hep-th
keywords
shear-freealmostclasscovariantexistexpandexpansionflrw
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We show in a fully covariant way that, there exist a class of $f(R)$ models for which a shear-free, almost FLRW universe can expand and rotate at the same time .
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