(A5) In the following, we express first order perturbations in components of torsion tensor, torsion vector, torsion scalar and Gauss-Bonnet scalar for different modes separately

Background The non-zero components of the torsion tensor, torsion vector, torsion scalar, Gauss-Bonnet term in the background (flat FLRW) are T ˆi 0ˆj = Hδ ˆiˆj , (A1) T α 0α

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Gauge invariant perturbations of $F(T,T_G)$ Cosmology

gr-qc · 2025-09-02 · unverdicted · novelty 5.0

Derives gauge-invariant perturbation equations for F(T, T_G) cosmology and provides physical interpretations for new contributions in each mode.

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Gauge invariant perturbations of $F(T,T_G)$ Cosmology gr-qc · 2025-09-02 · unverdicted · none · ref 6
Derives gauge-invariant perturbation equations for F(T, T_G) cosmology and provides physical interpretations for new contributions in each mode.

(A5) In the following, we express first order perturbations in components of torsion tensor, torsion vector, torsion scalar and Gauss-Bonnet scalar for different modes separately

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