数学
内射函数
纯数学
投射模
内射模
简单模块
森田疗法
戒指(化学)
投影覆盖
森田等价
扁平模块
局部环
投射试验
组合数学
标识
DOI:10.1007/s11464-020-0877-2
摘要
Let $${\Lambda _{(0,0)}} = \left( {\matrix{A \;\;\;\;\;\;\;\; {_A{N_B}} \cr {_B{M_A}}\;\;\;\; B \cr } } \right)$$
be a Morita ring, where the bimodule homomorphisms ϕ and ψ are zero. We study the finite presentedness, locally coherence, pure projectivity, pure injectivity, and FP-injectivity of modules over Λ(0,0). Some applications are then given.
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