U+2A91 "⪑" Less-than Above Greater-than Above Double-Line Equal Unicode Character

U+2A91 "⪑" Less-than Above Greater-than Above Double-Line Equal is a mathematical symbol used primarily in formal logic and set theory to represent a relational operator that combines a less-than sign above a greater-than sign, both positioned above a double-line equal sign. This complex glyph typically denotes a relation where one value is not only comparable but also explicitly not equal to another, often indicating a strict ordering or a specific type of inequality with an underlying equivalence structure. It belongs to the Supplemental Mathematical Operators block and is rarely used outside specialized academic or technical texts, where clarity about partial orders or non-transitive relations is essential.

General Properties

Code Point	U+2A91
Version Added	3.2
Name	Less-than Above Greater-than Above Double-Line Equal
Block	Supplemental Mathematical Operators
General Category	Math Symbol
Canonical Combining Class	Not Reordered
Bidirectional Class	Other Neutral
Mirrored	Yes
Mirrored Character	"⪒" U+2A92 Greater-than Above Less-than Above Double-Line Equal

Encodings

HTML Decimal Encoding	⪑
HTML Hex Encoding	⪑
UTF-8 Encoding	0xE2 0xAA 0x91
UTF-16 Encoding	0x2A91
UTF-32 Encoding	0x00002A91
C/C++/Java Escape	\u2a91

Unicode Properties

NFC Quick Check	Yes
NFD Quick Check	Yes
NFKC Quick Check	Yes
NFKD Quick Check	Yes
Numeric Type	None
Numeric Value	NaN
Line Break	Alphabetic
Script	Common
Script Extensions	Common
Indic Syllabic Category	Other
Pattern Syntax	Yes
Math	Yes
Vertical Orientation	Rotated
Grapheme Base	Yes
Grapheme Cluster Break	Other
Word Break	Other
Sentence Break	Other