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USF St. Petersburg campus Faculty Publications
Linearly Independent Vertices and Minimum Semidefinite Rank
Document Type
Article
Publication Date
2009
ISSN
0024-3795
Abstract
We study the minimum semidefinite rank of a graph using vector representations of the graph and of certain subgraphs. We present a sufficient condition for when the vectors corresponding to a set of vertices of a graph must be linearly independent in any vector representation of that graph, and conjecture that the resulting graph invariant is equal to minimum semidefinite rank. Rotation of vector representations by a unitary matrix allows us to find the minimum semidefinite rank of the join of two graphs. We also improve upon previous results concerning the effect on minimum semidefinite rank of the removal of a vertex.
Publisher
Elsevier
Recommended Citation
Hackney, P., Harris, B., Lay, M., Mitchell, L., Narayan, S., & Pascoe, A. (2009). Linearly independent vertices and minimum semidefinite rank. Linear Algebra and its Applications, 431(8), 1105-1115. https://doi.org/10.1016/j.laa.2009.03.030.