U+1D42E "𝐮" Mathematical Bold Small U Unicode Character
Unicode Version 17.0
𝐮
U+1D42E "𝐮" Mathematical Bold Small U is a glyph representing the lowercase letter 'u' in a bold typeface, designed specifically for use in mathematical and scientific notation to distinguish variables, vectors, or symbols from regular text. It belongs to the Mathematical Alphanumeric Symbols block, which was introduced to allow clear, unambiguous representation of mathematical expressions in plain text without relying on formatting or fonts. This character is commonly used in contexts such as calculus, physics, and engineering, where bold letters often denote vectors or matrices.
General Properties
| Code Point | U+1D42E |
| Version Added | 3.1 |
| Name | Mathematical Bold Small U |
| Block | Mathematical Alphanumeric Symbols |
| General Category | Lowercase Letter |
| Canonical Combining Class | Not Reordered |
| Bidirectional Class | Left To Right |
| Decomposition Type | Font |
| Decomposition Mapping | "u" U+0075 Latin Small Letter U |
Encodings
| HTML Decimal Encoding | 𝐮 |
| HTML Hex Encoding | 𝐮 |
| UTF-8 Encoding | 0xF0 0x9D 0x90 0xAE |
| UTF-16 Encoding | 0xD835 0xDC2E |
| UTF-32 Encoding | 0x0001D42E |
| C/C++/Java Escape | \ud835\udc2e |
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 | "u" U+0075 Latin Small Letter U |
| NFKC Simple Casefold | "u" U+0075 Latin Small Letter U |
| 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 |