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该符号在集合论中用于表示 X 是 Y 的超集,即。 Y 的所有元素都包含在 X 内。请注意,在此意义上 X 可以等于 Y。如果没有符号上的下划线,Y 将是 X 的严格子集,这意味着它们不能相等
This symbol is used in set theory to say that X is a superset of Y, ie. All elements of Y are contained within X. Note that X could be equal to Y in this meaning. Without the underlining on the symbol Y would be a strict subset of X meaning they cannot be equal
它意味着“X是Y的超集”。子集符号相同,但水平翻转。
It means "X is a superset of Y". The subset symbol is the same but flipped horizontally.
A s B ->超集:A 与 B 具有相同的元素,或者更多
A ⊃ B ->真超集:A 具有 B 的元素以及更多元素,
例如:
A 轴 B -> {1,2,3} Σ {1,2,3}
A⊃B→ {1, 2, 3, 4} ⊃ {1, 2, 3}
A ⊇ B -> Superset: A has the same elements as B, or more
A ⊃ B -> Proper Superset: A has B's elements and more
for example:
A ⊇ B -> {1, 2, 3} ⊇ {1, 2, 3}
A ⊃ B -> {1, 2, 3, 4} ⊃ {1, 2, 3}