19 ：１３２人目の素数さん [] ：2020/02/13(木) 23:05:12.40 ID:Nwzjxb6/ (6/8)
>>13

コンピューターを使う必要はない問題ですね。


20+1 ：１３２人目の素数さん [] ：2020/02/13(木) 23:20:27.48 ID:Nwzjxb6/ (7/8)
1 = {Φ, {a, b, c}}
2 = {Φ, {b}, {a, b, c}}
3 = {Φ, {a, b}, {a, b, c}}
4 = {Φ, {a}, {a, b}, {a, b, c}}
5 = {Φ, {a}, {b, c}, {a, b, c}}
6 = {Φ, {a}, {b}, {a, b}, {a, b, c}}
7 = {Φ, {b}, {a, b}, {b, c}, {a, b, c}}
8 = {Φ, {b}, {c}, {a, b}, {b, c}, {a, b, c}}
9 = {Φ, {a}, {b}, {c}, {a, b}, {b, c}, {c, a}, {a, b, c}}

1 ⊂ 2
1 ⊂ 3
1 ⊂ 4
1 ⊂ 5
1 ⊂ 6
1 ⊂ 7
1 ⊂ 8
1 ⊂ 9

2 ⊂ 6
2 ⊂ 7
2 ⊂ 8
2 ⊂ 9

3 ⊂ 4
3 ⊂ 6
3 ⊂ 7
3 ⊂ 8
3 ⊂ 9

4 ⊂ 6
4 ⊂ 9

5 ⊂ 9

6 ⊂ 9

7 ⊂ 8
7 ⊂ 9

8 ⊂ 9