infinite intersection of open sets need not to be open

5:30

15:49

5:52

1:30

10:26

10:13

5:39

7:43

1:53

21:33

1:53

3:01

کوتاه

10:24

3:29

1:12

4:32

2:09

10:04

5:15

1:37

11:20

کوتاه

7:42

6:21

1:41

5:45

6:24

27:27

22:04

7:09

2:40

5:27

13:51

8:31

1:44:32

2:31

18:40

3:47

13:02