论文标题
模型类别的简介，示例
An introduction to model categories with examples
论文作者
论文摘要
我们对模型类别进行非正式介绍，并在某些详细信息中处理三个重要示例：小类类别，DG代数类别和小型DG类别的类别。
We give an informal introduction to model categories, and treat three important examples in some details: the category of small categories, the category of dg algebras, and the category of small dg categories.
