Kaomojis
⭕️💨
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#empty circle
#nothing inside
#zero elements
#null set
#ensemble vide
#puff of air
{}Ø
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#null set
#zero elements
#ensemble vide
{}`❌
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#set notation
#crossed out set
#incorrect set
#null set
#zero elements
#ensemble vide
#empty circle #nothing inside #zero elements #null set #ensemble vide #puff of air