PROCEEDINGS OF THE AMERICAN MATHEMATICAL SOCIETY, v.146, no.4, pp.1495 - 1503
AMER MATHEMATICAL SOC
In this paper, we will prove that a problem deciding whether there is an upper-triangular coordinate in which a character is not in the state of a Hilbert point is NP-hard. This problem is related to the GIT-semistability of a Hilbert point.
(c) 2017 American Mathematical Society