U+29B0 Reversed Empty Set
U+29B0 was added to Unicode in version 3.2 (2002). It belongs to the block
This character is a Math Symbol and is commonly used, that is, in no specific script.
The glyph is not a composition. It has a Neutral East Asian Width. In bidirectional context it acts as Other Neutral and is not mirrored. The glyph can, under circumstances, be confused with 1 other glyphs. In text U+29B0 behaves as Alphabetic regarding line breaks. It has type Other for sentence and Other for word breaks. The Grapheme Cluster Break is Any.
The Wikipedia has the following information about this codepoint:
In mathematics, the empty set is the unique set having no elements; its size or cardinality (count of elements in a set) is zero. Some axiomatic set theories ensure that the empty set exists by including an axiom of empty set, while in other theories, its existence can be deduced. Many possible properties of sets are vacuously true for the empty set.
Any set other than the empty set is called nonempty.
In some textbooks and popularizations, the empty set is referred to as the "null set". However, null set is a distinct notion within the context of measure theory, in which it describes a set of measure zero (which is not necessarily empty). The empty set may also be called the void set.
Representations
System  Representation 

Nº  10672 
UTF8  E2 A6 B0 
UTF16  29 B0 
UTF32  00 00 29 B0 
URLQuoted  %E2%A6%B0 
HTML hex reference  ⦰ 
Wrong windows1252 Mojibake  â¦° 
HTML named entity  ⦰ 
Related Characters
Confusables
Elsewhere
Complete Record
Property  Value 

3.2 (2002)  
REVERSED EMPTY SET  
—  
Miscellaneous Symbols  
Math Symbol  
Common  
Other Neutral  
Not Reordered  
None  


✘  




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✘  
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✘  
✘  
✘  
✘  
✘  


Any  
✔  
✘  
✘  
✘  
✘  
✘  
✘  
✘  
✘  
✘  
—  
NA  
Other  
—  
✘  
✘  
✔  
✘  
Yes  
Yes  


Yes  
Yes  
✘  
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✔  
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Other  
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Other  
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✘  
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None  
Neutral  
Not Applicable  
—  
No_Joining_Group  
Non Joining  
Alphabetic  
None  
not a number  


R 