╱🚧 A ⊆ B, A ⊂ B, A = B
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⟩ ⟩ ⟩ 集合間關係
描述「兩個集合之間的關係敘述()」,主要有:
:A⊆BA \subseteq BA⊆B, A⊂BA \subset BA⊂B
相等關係: A=BA=BA=B
包含關係:A ⊆ B
Discrete Mathematics (Oscar Levin) ⟩ 0.2 Sets (p.6)