U+1D54C "𝕌" Mathematical Double-Struck Capital U Unicode Character

U+1D54C "𝕌" Mathematical Double-Struck Capital U is part of the Mathematical Alphanumeric Symbols block, designed to represent the letter U in a double struck or blackboard bold typeface commonly used in mathematical notation to denote specific number sets or algebraic structures. This character is often employed to signify the universe set in set theory or a universal algebra, as well as other specialized mathematical concepts where a distinct, stylized capital letter is needed to avoid confusion with standard text. It is encoded in Unicode for use in plain text environments, allowing mathematicians and scientists to write precise, machine readable expressions without relying on font based formatting.

General Properties

Code Point	U+1D54C
Version Added	3.1
Name	Mathematical Double-Struck Capital U
Block	Mathematical Alphanumeric Symbols
General Category	Uppercase Letter
Canonical Combining Class	Not Reordered
Bidirectional Class	Left To Right
Decomposition Type	Font
Decomposition Mapping	"U" U+0055 Latin Capital Letter U

Encodings

HTML Decimal Encoding	𝕌
HTML Hex Encoding	𝕌
UTF-8 Encoding	0xF0 0x9D 0x95 0x8C
UTF-16 Encoding	0xD835 0xDD4C
UTF-32 Encoding	0x0001D54C
C/C++/Java Escape	\ud835\udd4c

Unicode Properties

NFC Quick Check	Yes
NFD Quick Check	Yes
Numeric Type	None
Numeric Value	NaN
Line Break	Alphabetic
Uppercase	Yes
Cased	Yes
Changes When NFKC Casefolded	Yes
NFKC Casefold	"u" U+0075 Latin Small Letter U
NFKC Simple Casefold	"u" U+0075 Latin Small Letter U
Script	Common
Script Extensions	Common
Indic Syllabic Category	Other
ID Start	Yes
XID Start	Yes
ID Continue	Yes
XID Continue	Yes
Alphabetic	Yes
Math	Yes
Other Math	Yes
Vertical Orientation	Rotated
Grapheme Base	Yes
Grapheme Cluster Break	Other
Word Break	Alphabetic letter
Sentence Break	Upper