U+1D423 "𝐣" Mathematical Bold Small J Unicode Character
Unicode Version 17.0
𝐣
U+1D423 "𝐣" Mathematical Bold Small J is a specialized typographic symbol belonging to the Mathematical Alphanumeric Symbols block, designed for use in scientific and mathematical notation where a bold, italicized lowercase letter j is required to distinguish a variable from plain text or other formatting. It represents the twenty-second letter of the Latin alphabet and is commonly employed in fields like physics, engineering, and mathematics to denote variables, vectors, or imaginary units, such as the square root of negative one, in contexts that demand a clear, stylized representation for complex formulas or computer-based typesetting.
General Properties
| Code Point | U+1D423 |
| Version Added | 3.1 |
| Name | Mathematical Bold Small J |
| Block | Mathematical Alphanumeric Symbols |
| General Category | Lowercase Letter |
| Canonical Combining Class | Not Reordered |
| Bidirectional Class | Left To Right |
| Decomposition Type | Font |
| Decomposition Mapping | "j" U+006A Latin Small Letter J |
Encodings
| HTML Decimal Encoding | 𝐣 |
| HTML Hex Encoding | 𝐣 |
| UTF-8 Encoding | 0xF0 0x9D 0x90 0xA3 |
| UTF-16 Encoding | 0xD835 0xDC23 |
| UTF-32 Encoding | 0x0001D423 |
| C/C++/Java Escape | \ud835\udc23 |
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 | "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 |
| Soft Dotted | 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 |