Note on positive semidefinite maximum nullity and positive semidefinite zero forcing number of partial 2-trees Article Sidebar PDF Published: Jan 1, 2012 DOI: https://doi.org/10.13001/1081-3810.1506 Main Article Content J. Ekstrand C. Erickson D. Hay L. Hogben J. Roat Article Details Issue Vol. 23 (2012) Section Article