标题： 关于变化引力函数的倒数Wald定理 显示英文标题

标题： A reciprocal Wald theorem for varying gravitational function

摘要： 我们研究当宇宙常数在由具有完美流体的广义标量张量理论势能所模仿时，是否是一个自然问题，针对Bianchi类型I和V模型。 然后我们推导出一个反向Wald定理，给出当引力函数变化时势能趋于非零常数的条件。 我们还得到了使势能消失或发散的条件。 显示英文摘要

摘要： We study when a cosmological constant is a natural issue if it is mimicked by the potential of a massive Hyperextended Scalar Tensor theory with a perfect fluid for Bianchi type I and V models. We then deduce a reciprocal Wald theorem giving the conditions such that the potential tends to a non vanishing constant when the gravitational function varies. We also get the conditions allowing the potentiel to vanish or diverge.