L9_A
3.1 Sequentially compact(cont.)
(1)Lebesgue number for open cover
L9_B
3.1 Compactness(cont.)
(1)Bolzano-Weierstrass thm(cont.)
(2)老師提點:如何寫證明
L9_C
3.1 Compactness(cont.)
(1)Lemma1:
Lebesgue number for open cover
(2)Lemma2:
Sequentially compact set is totally bounded
L9_D
3.1 Compactness(cont.)
(1)Lemma2:
Sequentially compact set is totally bounded