Distributive laws

This post is structured as follows:

• X. Chen, Z.-C. Gu, Z.-X. Liu, & X.-G. Wen. (2013). Symmetry protected topological orders and the group cohomology of their symmetry group. Phys. Rev. B, 87:155114–155162. https://link.aps.org/doi/10.1103/PhysRevB.87.155114