U+1D471 "𝑱" Mathematical Bold Italic Capital J Unicode Character
Unicode Version 17.0
𝑱
U+1D471 "𝑱" Mathematical Bold Italic Capital J is a typographic variant of the Latin capital letter J, designed to combine bold weight with italic slant for use in mathematical and scientific notation. It belongs to the Mathematical Alphanumeric Symbols block, which was introduced to provide distinct, unambiguous glyphs that avoid confusion between variables, operators, and plain text in complex formulas. This character is commonly employed to denote vectors, matrices, or specific mathematical objects such as the Bessel function of the first kind, where the bold italic style helps signal its specialized role.
General Properties
| Code Point | U+1D471 |
| Version Added | 3.1 |
| Name | Mathematical Bold Italic Capital J |
| Block | Mathematical Alphanumeric Symbols |
| General Category | Uppercase Letter |
| Canonical Combining Class | Not Reordered |
| Bidirectional Class | Left To Right |
| Decomposition Type | Font |
| Decomposition Mapping | "J" U+004A Latin Capital Letter J |
Encodings
| HTML Decimal Encoding | 𝑱 |
| HTML Hex Encoding | 𝑱 |
| UTF-8 Encoding | 0xF0 0x9D 0x91 0xB1 |
| UTF-16 Encoding | 0xD835 0xDC71 |
| UTF-32 Encoding | 0x0001D471 |
| C/C++/Java Escape | \ud835\udc71 |
Unicode Properties
| NFC Quick Check | Yes |
| NFD Quick Check | Yes |
| Numeric Type | None |
| Numeric Value | NaN |
| Line Break | Alphabetic |
| Uppercase | Yes |
| Cased | Yes |
| Changes When NFKC Casefolded | Yes |
| NFKC Casefold | "j" U+006A Latin Small Letter J |
| NFKC Simple Casefold | "j" U+006A Latin Small Letter J |
| 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 | Upper |