This character is a Math Symbol and is commonly used, that is, in no specific script.
The glyph is not a composition. It has no designated width in East Asian texts. In bidirectional text it acts as Other Neutral. When changing direction it is not mirrored. The word that U+29B0 forms with similar adjacent characters prevents a line break inside it. The glyph can be confused with one other glyph.
The Wikipedia has the following information about this codepoint:
In mathematics, the empty set or void 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 non-empty.
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).
Representations
System
Representation (click value to copy)
Nº
10672
UTF-8
E2 A6 B0
UTF-16
29 B0
UTF-32
00 00 29 B0
URL-Quoted
%E2%A6%B0
HTML hex reference
⦰
Wrong windows-1252 Mojibake
⦰
HTML named entity
⦰
Encoding: GB18030 (hex bytes)
81 38 82 36
RFC 5137
\u'29B0'
Bash and Zsh inside echo -e
\u29B0
C and C++
\u29B0
C#
\u29B0
CSS
\0029B0
Excel
=UNICHAR(10672)
Go
\u29B0
JavaScript
\u29B0
Modern JavaScript since ES6
\u{29b0}
JSON
\u29B0
Java
\u29B0
Lua
\u{29B0}
Matlab
char(10672)
Perl
"\x{29B0}"
PHP
\u{29b0}
PostgreSQL
U&'\29B0'
PowerShell
`u{29B0}
Python
\u29B0
Ruby
\u{29b0}
Rust
\u{29b0}
Click the star button next to each label to set this representation as favorite or remove it from the favorites. Favorites will be shown initially. (Favorites are stored locally on your computer and never sent over the internet.)