The space of homogeneous preserving semistar operations on graded domains

Abstract

Let $R={⨁}_{\alpha \in \Gamma }{R}_{\alpha }$ be a graded integral domain. In this paper we study the space of homogeneous preserving semistar operations on $R$. We show if $\star$ is a homogeneous preserving semistar operation on $R$, then ${\star }_a$ is also homogeneous preserving. Let $KR(R,b)$ be the homogeneous Kronecker function ring of $R$ with respect to the $b$-operation. It is shown that the set of valuation overrings of $KR(R,b)$, endowed with the Zariski topology, is homeomorphism to $Za{r}_h(R)$, the set of gr-valuation overrings of $R$, endowed with the Zariski topology. We also show that the set $SSta{r}_{f,hp}(R)$ of finite type, homogeneous preserving semistar operations on $R$, endowed with the Zariski topology, is a spectral space.

References in corpus (1)

• Some topological considerations on semistar operations