Minimum (maximum) rank of tensors and the sign nonsingular tensors
  In this paper, we define the minimum (maximum) rank, term rank and the sign nonsingular of tensors. The sufficiency and necessity for the minimum rank of a real tensor to be $1$ is given. And we show that the maximum rank of a tensor is not less than the term rank. We also prove that the minimum rank of a sign nonsingular tensor is not less than the dimension of it. And we get some characterizations of a tensor having sign left or sign right inverses. 
Changjiang Bu, Wenzhe Wang, Lizhu Sun and Jiang Zhou
math.CO