论文标题
封闭的弹跳宇宙的cosmographic分析，其$ f（r，t）$重力的不同宇宙常数
Cosmographic analysis of a closed bouncing universe with the varying cosmological constant in $f(R,T)$ gravity
论文作者
论文摘要
$ f（r，t）$重力中物质反弹的建模已呈现，但没有违反无效的能量条件。仅允许具有负压的封闭宇宙与一些最近的观察结果有良好的一致性，这些观察结果有利于积极曲率的宇宙。我们的结果与最近的一些作品一致，在这些作品中，正曲率和真空能的结合导致非单星弹跳，而无需违反无效的能量条件。已经讨论了模型的稳定性。为衍生模型开发了cosmographic参数，以解释宇宙的加速扩展。
Modeling of matter bounce in $f(R,T)$ gravity has been presented with no violation of the null energy condition. Only a closed universe with negative pressure is allowed in good agreement with some recent observations which favor a universe with positive curvature. Our results agree with some recent works in which a combination of positive curvature and vacuum energy leads to non-singular bounces with no violation of the null energy condition. The stability of the model has been discussed. The cosmographic parameters are developed for the derived model to explain the accelerated expansion of the universe.
