Anisotropic Multiverse with Varying $c$, $G$ and Study of Thermodynamics
  We assume the anisotropic model of the Universe in the framework of varying
speed of light $c$ and varying gravitational constant $G$ theories and study
different types of singularities. For the singularity models, we write the
scale factors in terms of cosmic time and found some conditions for possible
singularities. For future singularities, we assume the forms of varying speed
of light and varying gravitational constant. For regularizing big bang
singularity, we assume two forms of scale factors: sine model and tangent
model. For both the models, we examine the validity of null energy condition
and strong energy condition. Start from the first law of thermodynamics, we
study the thermodynamic behaviours of $n$ number of Universes (i.e.,
Multiverse) for (i) varying $c$, (ii) varying $G$ and (iii) both varying $c$
and $G$ models. We found the total entropies for all the cases in the
anisotropic Multiverse model. We also found the nature of the Multiverse if
total entropy is constant.
