如果一个惯量任意符号模式的任意一个或多个非零元被零取代后所得到的符号模式不是惯量任意的,则这个惯量任意符号模式称为极小惯量任意符号模式(MIAP).文献[1]中In-JacKim等给出一类不可约的惯量任意符号模式ψ2k+1(k≥2),并证明了当k=2,3时是(MIAP).文章将证明k≥4时ψ2k+1也是(MIAP).
A sign pattern S is minimal inertially arbitrary if it is not inertially arbitrary when any one or more nonzero entries of S is replaced by zero.In [1] In-Jac Kim,et al proved aD.D.Olesky famliy of irreducible inertially arbitrary sign patterns ψ2k+1(k≥2),and showed that ψ5 and ψ7 are minimal inertially arbitrary.In this paper,it is proved that ψ2k+1(k≥4) are also minimally inertially arbitrary.