I see that there was no activity in this room for more than a month. I'll just remind that the last time when we discussed whether to keep this room or not was here: chat.stackexchange.com/transcript/61560/2017/11/30 and chat.stackexchange.com/transcript/61560/2017/12/1

Since there is the room Geometry & Topology which is more general and BAYMAX created a separate room Differentiable Manifolds for the course they are currently studying, I'd say this room is no longer needed.