“Poincare-Lefschetz duality”的概念、定义、翻译、参考文献-科学参考

单词	Poincare-Lefschetz duality
释义	Poincare-Lefschetz duality Mathematics ＞拓扑学与几何学＞代数拓扑学＞释义 Poincare-Lefschetz duality庞加莱-莱夫谢茨对偶
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