U+1D51F "𝔟" Mathematical Fraktur Small B Unicode Character

U+1D51F "𝔟" Mathematical Fraktur Small B is a stylized letter from the Mathematical Alphanumeric Symbols block, designed to represent the lowercase letter 'b' in a Fraktur typeface for use in mathematical and scientific notation. It allows authors to clearly distinguish variables or constants in contexts where standard Latin characters might be confused with other symbols or where a specific typographic style is required for formalism, such as in set theory or number theory. This character is part of a larger set of Fraktur letters that provide a dedicated, unambiguous representation for mathematical expressions, ensuring compatibility across digital platforms and documents.

General Properties

Code Point	U+1D51F
Version Added	3.1
Name	Mathematical Fraktur Small B
Block	Mathematical Alphanumeric Symbols
General Category	Lowercase Letter
Canonical Combining Class	Not Reordered
Bidirectional Class	Left To Right
Decomposition Type	Font
Decomposition Mapping	"b" U+0062 Latin Small Letter B

Encodings

HTML Decimal Encoding	𝔟
HTML Hex Encoding	𝔟
UTF-8 Encoding	0xF0 0x9D 0x94 0x9F
UTF-16 Encoding	0xD835 0xDD1F
UTF-32 Encoding	0x0001D51F
C/C++/Java Escape	\ud835\udd1f

Unicode Properties

NFC Quick Check	Yes
NFD Quick Check	Yes
Numeric Type	None
Numeric Value	NaN
Line Break	Alphabetic
Lowercase	Yes
Cased	Yes
Changes When NFKC Casefolded	Yes
NFKC Casefold	"b" U+0062 Latin Small Letter B
NFKC Simple Casefold	"b" U+0062 Latin Small Letter B
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	Lower