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Our results generalize the relavant results of Happel [ Hap 2 ], Rickard [ Ric 3 ], Du [ Du ] and Tachikawa - Wakamatsu [ TW ].
这推广了D.Happel [ Hap2 ], J. Rickard [ Ric3 ], 杜先能 [ Du ] 及Tachikawa-Wakamatsu [ TW ] 的相应结果.
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