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arXiv 1601.07657math.AC
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Prufer-like环的弱整体维数

Weak global dimension of Prufer-like rings

K. Adarbeh, S. Kabbaj

摘要:

1969年,奥索夫斯基证明了一个链式环(即,具有零因子的局部算术环)具有无限弱整体维数;即,算术环的弱整体维数是0、1或无限。2007年,Bazzoni和Glaz研究了Prufer类环的同调性质,重点是高斯环。他们证明了奥索夫斯基的上述结果在相干高斯环的上下文中是有效的(更一般地说,在相干Prufer环中)。他们以一个猜想结束了他们的论文,该猜想支持高斯环的弱整体维数是0,1或无限。在2010年,Bakkari-Kabbaj-Mahdou给出了一个高斯环的例子,它既不是算术的也不是相干的,并且具有无限弱整体维数。2011年,Abuhlail-Jarrar-Kabbaj引入并研究了一类新的fqp-环,它严格地介于算术环和高斯环之间。然后,他们证明了fqp-环的Bazzoni-Glaz猜想。本文综述了近年来文献中关于Prufer类环的弱整体维数的一些研究成果,使这一主题更容易理解并吸引广泛的读者。作为一个前奏,本文的第一部分提供了充分的细节Osofsky的证明存在一个模块的无限投射维数的链环。大量的例子-作为平凡环的扩展-来说明本文所涉及的概念和结果。

英文摘要:

In 1969, Osofsky proved that a chained ring (i.e., local arithmetical ring) with zero divisors has infinite weak global dimension; that is, the weak global dimension of an arithmetical ring is 0, 1, or infinite. In 2007, Bazzoni and Glaz studied the homological aspects of Prufer-like rings, with a focus on Gaussian rings. They proved that Osofsky's aforementioned result is valid in the context of coherent Gaussian rings (and, more generally, in coherent Prufer rings). They closed their paper with a conjecture sustaining that ``the weak global dimension of a Gaussian ring is 0, 1, or infinite. In 2010, Bakkari-Kabbaj-Mahdou provided an example of a Gaussian ring which is neither arithmetical nor coherent and has an infinite weak global dimension. In 2011, Abuhlail-Jarrar-Kabbaj introduced and investigated the new class of fqp-rings which stands strictly between the two classes of arithmetical rings and Gaussian rings. Then, they proved the Bazzoni-Glaz conjecture for fqp-rings. This paper surveys a few recent works in the literature on the weak global dimension of Prufer-like rings making this topic accessible and appealing to a broad audience. As a prelude to this, the first section of this paper provides full details for Osofsky's proof of the existence of a module with infinite projective dimension on a chained ring. Numerous examples -arising as trivial ring extensions- are provided to illustrate the concepts and results involved in this paper.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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