Quasi-Convex Free Polynomials

Sriram Balasubramanian, Scott McCullough

Let $\Rx$ denote the ring of polynomials in $g$ freely non-commuting variables $x=(x_1,...,x_g)$. There is a natural involution * on $\Rx$ determined by $x_j^{\ast }=x_j$ and $(pq)^*=q^*…