American Mathematical Monthly
Volume 76; Issue 21
|
|
4
|
|
6
|
|
7
|
|
15
|
|
16
|
|
19
|
|
21
|
|
25
|
|
28
|
|
29
|
|
31
|
|
35
|
|
36
|
|
37
|
|
38
|
|
44
|
|
45
|
|
46
|
|
47
|
|
48
|
|
49
|
|
53
|
|
54
|
|
56
|
|
57
|
|
58
|
|
60
|
|
61
|
|
64
|
|
65
|
|
76
|
|