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空 そら集合 しゅうごうではありません
sorashūgōdewārimasen

敬
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Noun
, 
Desu Copula
, 
Negation Auxiliary

The polite negative form of 空集合

1. Is not the empty set.; Is not empty.

Negative
, 
Polite
, 
Formal Register
, 
Mathematics

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空集合ではありません

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