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· U+2252
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∀
全称記号
∁
Complement
∂
偏微分
∃
存在記号
∄
There Does Not Exist
∅
空集合
∆
増分
∇
ナブラ
∈
属する
∉
要素の否定
∊
Small Element Of
∋
元として含む
∌
Does Not Contain As Member
∍
Small Contains As Member
∎
墓石記号
∏
総乗
∐
N-Ary Coproduct
∑
総和
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