1. $n$-flat and $n$-FP-injective modules Creator: Yang, Xiaoyan and Liu, Zhongkui Format: bez média and svazek Type: model:article and TEXT Subject: $n$-flat module, $n$-FP-injective module, $n$-coherent ring, and cotorsion theory Language: English Description: In this paper, we study the existence of the $n$-flat preenvelope and the $n$-FP-injective cover. We also characterize $n$-coherent rings in terms of the $n$-FP-injective and $n$-flat modules. Rights: http://creativecommons.org/publicdomain/mark/1.0/ and policy:public