U+1D6BA "𝚺" Mathematical Bold Capital Sigma Unicode Character
Unicode Version 17.0
𝚺
U+1D6BA "𝚺" Mathematical Bold Capital Sigma is a glyph in the Mathematical Alphanumeric Symbols block, designed for use in mathematical and scientific notation where a bold, uppercase Greek letter sigma is required. It represents the summation symbol or a standard uppercase sigma in contexts such as linear algebra, statistics, or physics, particularly when the text demands a distinct bold style for clarity or formatting consistency. This character is separate from the regular Greek capital sigma (Σ) in the Greek and Coptic block, allowing it to align with other bold mathematical symbols without relying on font-based styling.
General Properties
| Code Point | U+1D6BA |
| Version Added | 3.1 |
| Name | Mathematical Bold Capital Sigma |
| Block | Mathematical Alphanumeric Symbols |
| General Category | Uppercase Letter |
| Canonical Combining Class | Not Reordered |
| Bidirectional Class | Left To Right |
| Decomposition Type | Font |
| Decomposition Mapping | "Σ" U+03A3 Greek Capital Letter Sigma |
Encodings
| HTML Decimal Encoding | 𝚺 |
| HTML Hex Encoding | 𝚺 |
| UTF-8 Encoding | 0xF0 0x9D 0x9A 0xBA |
| UTF-16 Encoding | 0xD835 0xDEBA |
| UTF-32 Encoding | 0x0001D6BA |
| C/C++/Java Escape | \ud835\udeba |
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 | "σ" U+03C3 Greek Small Letter Sigma |
| NFKC Simple Casefold | "σ" U+03C3 Greek Small Letter Sigma |
| 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 |