On the real rank of monomials
arXiv:1602.01151 · doi:10.1007/s00209-016-1774-y
Abstract
In this paper we study the real rank of monomials and we give an upper bound for the real rank of all monomials. We show that the real and the complex ranks of a monomial coincide if and only if the least exponent is equal to one.
7 pages; Conjecture 1 and Conjecture 2 from the previous versions have been proven in Theorem 3.4 and Theorem 3.5