5 citations · 7 across the 6 of their papers we have counts for
Showing 2019 · math.RTShow all
2 papers · 2 filters
math.RT2019
The lower extension groups and quotient categories
Xiaofa Chen, Xiao-Wu Chen
For a certain full additive subcategory X of an additive category A, one defines the lower extension groups in relative homological algebra. We show that these groups are isomorphi…
math.RT2019★ 5 cited
An informal introduction to dg categories
Xiaofa Chen, Xiao-Wu Chen
In this informal introduction to dg categories, the slogan is that dg categories are more rudimentary than triangulated categories. We recall some details on the dg quotient catego…