Hereditary NC Polynomials & Positivity Domains

Abdellah Islam, Jurij Volčič, Hugo J. Woerdeman

Noncommutative polynomials, elements of the free algebra generated by several noncommuting variables $x_1,...,x_g,x_1^{\ast },...,x_g^{\ast }$, are of importance in noncommutative algebra, fre…