2 problems

Let ${\cal F}_u$ be the graph used to describe the Walker–Wang ground state, and let ${\cal B}_1$ be the basis determined by the curves ${\cal C}_1$. In the modular-fusion-category…

The Walker–Wang model is defined for a cubical lattice and generalizes $(2+1)$-dimensional string-net models to $(3+1)$ dimensions. The Crane–Yetter TQFT is believed to describe BF…