特殊用法approximation lemma1.逼近引理Fatou-Lebesgue lemma1.【数】法都-勒贝格引理fundamental lemma1.基本引理Glivenko Cantelli lemma1.【数】格里汶哥-坎泰利引理Kuratowski's lemma1.【数】库拉托夫斯基引理maximal ergodic lemma1.极大遍历引理Riemann-Lebesgue lemma1.【数】黎曼勒贝格引理Schur's lemma1.【数】舒尔引理Schwarz's lemma1.【数】施瓦兹引理Urysohn lemma1.【数】乌里申引理Zorn's lemma1.【数】佐恩引理