3 citations · 4 across the 5 of their papers we have counts for
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math.CO2013★ 3 cited
Minimum ranks of sign patterns via sign vectors and duality
Marina Arav, Frank J. Hall, Zhongshan Li +3
A {\it sign pattern matrix} is a matrix whose entries are from the set . The minimum rank of a sign pattern matrix is the minimum of the ranks of the real matrices…
math.CO2013
The minimum rank of a sign pattern matrix with a 1-separation
Marina Arav, Frank J. Hall, Zhongshan Li +3
A sign pattern matrix is a matrix whose entries are from the set . If is an sign pattern matrix, the qualitative class of , denoted , is the set…