给出了Ding投射模是强Ding投射模的条件,证明了任意i=1,2,…,m,若D-gldim（Ri）〈∞,则SDP（∏m i=1 Ri）=DP（∏m i=1Ri）当且仅当任意i,SDP（Ri......

将强Ding投射(内射)模推广到强Ding投射(内射)复形,证明了强Ding投射(内射)复形G的每个层次是强Ding投射(内射)R-模,且对任意平坦(......