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Characterizations of graded Pr\"ufer $\star$-multiplication domains, II

Commutative Algebra 2017-08-01 v2

Abstract

Let R=αΓRαR=\bigoplus_{\alpha\in\Gamma}R_{\alpha} be a graded integral domain and \star be a semistar operation on RR. For aRa\in R, denote by C(a)C(a) the ideal of RR generated by homogeneous components of aa and forf=f0+f1X++fnXnR[X]f=f_0+f_1X+\cdots+f_nX^n\in R[X], let \Af:=i=0nC(fi)\A_f:=\sum_{i=0}^nC(f_i). Let N():={fR[X]f0and\Af=R}N(\star):=\{f\in R[X]\mid f\neq0\text{and}\A_f^{\star}=R^{\star}\}. In this paper we study relationships between ideal theoretic properties of \NA(R,):=R[X]N()\NA(R,\star):=R[X]_{N(\star)} and the homogeneous ideal theoretic properties of RR. For example we show that RR is a graded Pr\"ufer-\star-multiplication domain if and only if \NA(D,)\NA(D,\star) is a Pr\"ufer domain if and only if \NA(R,)\NA(R,\star) is a B\'ezout domain. We also determine when \NA(R,v)\NA(R,v) is a PID.

Keywords

Cite

@article{arxiv.1610.04845,
  title  = {Characterizations of graded Pr\"ufer $\star$-multiplication domains, II},
  author = {Parviz Sahandi},
  journal= {arXiv preprint arXiv:1610.04845},
  year   = {2017}
}

Comments

Bull. Iranian Math. Soc. to appear