U+1D563 "𝕣" Mathematical Double-Struck Small R Unicode Character

U+1D563 "𝕣" Mathematical Double-Struck Small R is a glyph from the Mathematical Alphanumeric Symbols block, designed to represent the lowercase letter 'r' in a double-struck, or blackboard bold, typeface. This style is commonly used in mathematical notation to denote specific number sets or algebraic structures, such as the real numbers when paired with capital R, though the lowercase version often appears in specialized contexts like linear algebra or vector notation. Part of a larger set of double-struck letters, this character enables clear and distinct visual representation in academic and technical writing, particularly in digital formats where Unicode provides a standardized alternative to font-based formatting.

General Properties

Code Point	U+1D563
Version Added	3.1
Name	Mathematical Double-Struck 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 0x95 0xA3
UTF-16 Encoding	0xD835 0xDD63
UTF-32 Encoding	0x0001D563
C/C++/Java Escape	\ud835\udd63

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