bn:01608662n
Noun Concept
Categories: Mathematical symbols, Pages using multiple image with auto scaled images
EN
null sign  empty set sign  empty set symbol  null set sign  
EN
The null sign is often used in mathematics for denoting the empty set. Wikipedia
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EN
The null sign is often used in mathematics for denoting the empty set. Wikipedia
The sign ∅, associated with empty sets. Wiktionary
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Wikidata
Wiktionary