Hi everybody, I would like to chat about the physics of loop quantum cosmology. Let me list a few broad topics I'm interested in understanding better: 1. What simplifications/approximations make loop quantum cosmology a solvable simplification of full loop quantum gravity? 2. How is the Hamiltonian constraint dealt with and how does time emerge? 3. Why is the semi-classical limit easier here (as I understand it, the general semi-classical limit is still an open question, but please correct me if I'm wrong)? 4. What is the physics intuition behind the various cosmological results of the theory? Of course, I appreciate excellent pedagogical or review references if you know them, but I would primarily prefer to discuss the actual physics if anyone is interested/knowledgeable. As a start, I want to comprehend the basic setup. My understanding is that loop quantum cosmology makes some symmetry assumptions that enable a reduction of the degrees of the freedom. If so, can we state what these are in a simple way?