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arXiv · 2410.00437

The space of homogeneous preserving semistar operations on graded domains

Parviz Sahandi
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Abstract

Let $R=\bigoplus_{α\inΓ}R_α$ 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 $Zar_h(R)$, the set of gr-valuation overrings of $R$, endowed with the Zariski topology. We also show that the set $SStar_{f,hp}(R)$ of finite type, homogeneous preserving semistar operations on $R$, endowed with the Zariski topology, is a spectral space.

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Parviz Sahandi. 2024-10-01. The space of homogeneous preserving semistar operations on graded domains. https://doi.org/10.1007/s13398-022-01277-7

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