A recent discovery in holography is the idea of a dual not of a particular CFT but rather of an ensemble of CFT's and its gravitational interpretation.
In this talk, I will explain the case of the generalization of the recent work of Maloney-Witten and Afkhami-Jeddi et.al. Following a pedagogical introduction to the number theory requirements, I will talk about the holographic duality that follows from considering the average over toroidal CFTs with unequal left and right moving central charges.