The investigation of robust behavior interval polynoms

In this article with help new definition, the unit radius with center in zero is divides polynom on number roots outside and inside circle, is summarizes principle of exception zero for investigation robust behavior of families discreet polynomials. In partial case, for discreet interval polynomials is results graphic criteria they is belong to classes $(n,k)$ - equivalent discreet polynomials. Is discusses the employing this method for another families polynomials.