most citedPDRs4All: XVIII. The evolution of the PAH ionisation and PAH size distribution across the Orion Bar

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hep-th2026★ 2 cited

Equivalence of first and second order formulations of the Einstein-Hilbert theory

F. T. Brandt, J. Frenkel, S. Martins-Filho +1

We derive a general relation between the background effective actions, which directly proves that the two formulations of the Einstein-Hilbert theory with background fields are equ…