Morse Theory on 1-Skeleta
  Guillemin and Zara gave necessary and sufficient conditions under which Morse theoretic techniques could be used to construct an additive basis for the equivariant cohomology of a 1-skeleton that is either 3-independent or GKM. We show that their conditions remain valid for all 1-skeleta, 3-independent, GKM, or otherwise. 
Chris McDaniel
math.CO math.AC