Critical comments on the paper "Crossing $ω=-1$ by a single scalar field on a Dvali-Gabadadze-Porrati brane" by H Zhang and Z-H Zhu [Phys.Rev.D75,023510(2007)]

2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/223628It is demonstrated that the claim in the paper "Crossing $ω=-1$ by a single scalar field on a Dvali-Gabadadze-Porrati brane" by H Zhang and Z-H Zhu [Phys.Rev.D75,023510(2007)], about a prove that there do not exist scaling solutions in a universe with dust in a Dvali-Gabadadze-Porrati (DGP) braneworld scenario, is incorrect.5 pages, 8 eps figuresGeneral Relativity and Quantum CosmologyCritical comments on the paper "Crossing $ω=-1$ by a single scalar field on a Dvali-Gabadadze-Porrati brane" by H Zhang and Z-H Zhu [Phys.Rev.D75,023510(2007)]text