arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2005.02360math.CTmath.AT
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组合可达弱模型范畴

Combinatorial and accessible weak model categories

Simon Henry

摘要:

在以前的工作中,我们已经介绍了一个弱化的Quillen模型类别称为弱模型类别。它们仍然允许所有通常的模型范畴论的构造,但更容易构造,并且在某种意义上表现得更好。在本文中,我们继续发展他们的一般理论,通过引入组合和可访问的弱模型类别。我们给出了一个简单的充要条件,在此条件下,弱模型范畴可以扩展为左半模型范畴和右半模型范畴。作为应用,我们恢复了Cisinski-Olschok理论,并将其推广到弱模型和半模型范畴。我们还给出了组合可达弱模型结构的左、右Bousfield局部化的一般存在性定理,并结合上述结果给出了组合可达左、右半模型范畴的左、右Bousfield局部化的存在性结果,推广了Barwick的结果.令人惊讶的是,我们发现,任何左或右Bousfield本地化的一个可访问的或组合的Quillen模型类别总是存在的,没有适当的假设,并同时是一个左和右半模型类别,而不一定是一个Quillen模型类别本身。

英文摘要:

In a previous work, we have introduced a weakening of Quillen model categories called weak model categories. They still allow all the usual constructions of model category theory, but are easier to construct and are in some sense better behaved. In this paper we continue to develop their general theory by introducing combinatorial and accessible weak model categories. We give simple necessary and sufficient conditions under which such a weak model category can be extended into a left and/or right semi-model category. As an application, we recover Cisinski-Olschok theory and generalize it to weak and semi-model categories. We also provide general existence theorems for both left and right Bousfield localization of combinatorial and accessible weak model structures, which combined with the results above gives existence results for left and right Bousfield localization of combinatorial and accessible left and right semi-model categories, generalizing previous results of Barwick. Surprisingly,we show that any left or right Bousfield localization of an accessible or combinatorial Quillen model category always exists, without properness assumptions, and is simultaneously both a left and a right semi-model category, without necessarily being a Quillen model category itself.

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