U+1D5FF "𝗿" Mathematical Sans-Serif Bold Small R Unicode Character

U+1D5FF "𝗿" Mathematical Sans-Serif Bold Small R is a typographic variant of the lowercase Latin letter "r" designed specifically for mathematical notation, belonging to the Unicode block "Mathematical Alphanumeric Symbols." Its primary purpose is to serve as a distinct glyph in scientific and technical writing, allowing authors to differentiate variables, constants, or operator symbols from ordinary text without relying on formatting markup. Introduced to support the growing need for precise typographic representation in digital mathematics, this character is often used in fields like physics, engineering, and computer science where a bold sans-serif style helps highlight specific terms or elements within complex equations.

General Properties

Code Point	U+1D5FF
Version Added	3.1
Name	Mathematical Sans-Serif Bold 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 0x97 0xBF
UTF-16 Encoding	0xD835 0xDDFF
UTF-32 Encoding	0x0001D5FF
C/C++/Java Escape	\ud835\uddff

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