U+1D45F "𝑟" Mathematical Italic Small R Unicode Character

U+1D45F "𝑟" Mathematical Italic Small R is a typographic variant of the Latin letter "r" specifically designed for mathematical and scientific notation, where it serves distinct roles separate from its standard italic form. It is part of the Mathematical Alphanumeric Symbols block, enabling authors to differentiate mathematical variables from regular text, particularly for operations like correlation coefficients, growth rates, or geometric radii. This character ensures precise rendering in digital typesetting, avoiding ambiguity when a mathematician or researcher needs an italic "r" that is explicitly recognized as a mathematical symbol by software and fonts supporting Unicode.

General Properties

Code Point	U+1D45F
Version Added	3.1
Name	Mathematical Italic Small R
Block	Mathematical Alphanumeric Symbols
General Category	Lowercase Letter
Canonical Combining Class	Not Reordered
Bidirectional Class	Left To Right
Decomposition Type	Font
Decomposition Mapping	"r" U+0072 Latin Small Letter R

Encodings

HTML Decimal Encoding	𝑟
HTML Hex Encoding	𝑟
UTF-8 Encoding	0xF0 0x9D 0x91 0x9F
UTF-16 Encoding	0xD835 0xDC5F
UTF-32 Encoding	0x0001D45F
C/C++/Java Escape	\ud835\udc5f

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	"r" U+0072 Latin Small Letter R
NFKC Simple Casefold	"r" U+0072 Latin Small Letter R
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