f-Vectors of 3-Manifolds

Frank H. Lutz, Thom Sulanke, Ed Swartz

In 1970, Walkup completely described the set of $f$-vectors for the four 3-manifolds $S^3$, $S^{2}twist{S}^1$, $S^2\times S^1$, and $R{P}^3$. We improve one of Walkup's main restricti…