U+1D44F "𝑏" Mathematical Italic Small B Unicode Character

Unicode Version 17.0

𝑏

U+1D44F "𝑏" Mathematical Italic Small B is a typographic variant of the Latin letter "b" that is designed specifically for mathematical and scientific text, where it represents a variable, constant, or parameter in a slanted, italicized form distinct from the upright letter used in regular prose. This character belongs to the Mathematical Alphanumeric Symbols block, which provides a wide range of styled letters and digits to allow clear differentiation between symbols in equations, such as distinguishing a variable from a unit or a function name. By using this dedicated codepoint, authors and software can ensure consistent rendering and semantic meaning, avoiding the ambiguity that might arise from relying on font-based italic styling applied to a standard "b".

General Properties

Code Point U+1D44F
Version Added 3.1
Name Mathematical Italic 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 0x91 0x8F
UTF-16 Encoding 0xD835 0xDC4F
UTF-32 Encoding 0x0001D44F
C/C++/Java Escape \ud835\udc4f

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