U+1D437 "𝐷" Mathematical Italic Capital D Unicode Character
Unicode Version 17.0
𝐷
U+1D437 "𝐷" Mathematical Italic Capital D is a typographic glyph from the Mathematical Alphanumeric Symbols block, designed to represent a capital letter D in a distinct italic style for use in mathematical and scientific notation, where it often denotes variables, constants, or specific functions such as a derivative operator or a dimension in vector spaces. It belongs to a broader set of mathematical alphanumeric symbols that allow authors to visually distinguish between ordinary text and mathematical expressions without relying on formatting commands, ensuring clear semantic differentiation in digital documents and academic publications.
General Properties
| Code Point | U+1D437 |
| Version Added | 3.1 |
| Name | Mathematical Italic Capital D |
| Block | Mathematical Alphanumeric Symbols |
| General Category | Uppercase Letter |
| Canonical Combining Class | Not Reordered |
| Bidirectional Class | Left To Right |
| Decomposition Type | Font |
| Decomposition Mapping | "D" U+0044 Latin Capital Letter D |
Encodings
| HTML Decimal Encoding | 𝐷 |
| HTML Hex Encoding | 𝐷 |
| UTF-8 Encoding | 0xF0 0x9D 0x90 0xB7 |
| UTF-16 Encoding | 0xD835 0xDC37 |
| UTF-32 Encoding | 0x0001D437 |
| C/C++/Java Escape | \ud835\udc37 |
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 | "d" U+0064 Latin Small Letter D |
| NFKC Simple Casefold | "d" U+0064 Latin Small Letter D |
| 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 |