U+1D42B "𝐫" Mathematical Bold Small R Unicode Character
Unicode Version 17.0
𝐫
U+1D42B "𝐫" Mathematical Bold Small R is a typographic symbol belonging to the Mathematical Alphanumeric Symbols block, designed for use in mathematical and scientific notation where a bold, italicized lowercase letter 'r' is required to distinguish it from ordinary text. It is not a separate letter but a styled variant of the standard Latin small 'r', encoded to preserve semantic meaning in plain text contexts, such as variables or constants in equations, and is primarily rendered by specialized fonts that support mathematical formatting.
General Properties
| Code Point | U+1D42B |
| Version Added | 3.1 |
| Name | Mathematical 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 0x90 0xAB |
| UTF-16 Encoding | 0xD835 0xDC2B |
| UTF-32 Encoding | 0x0001D42B |
| C/C++/Java Escape | \ud835\udc2b |
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 |