- 42 名前：１３２人目の素数さん mailto:sage [2020/07/27(月) 15:12:55.97 ID:dppBRBhf.net]
- >>40 文字化け訂正
If B is a subset of A, then A is a superset of B, written A superset= B.
If A is a proper superset of B, this is written A superset B.
↓
If B is a subset of A, then A is a superset of B, written A ⊇ B.
If A is a proper superset of B, this is written A ⊃ B.
