U+222D "∭" Triple Integral Unicode Character
Unicode Version 17.0
∭
U+222D "∭" Triple Integral is a mathematical symbol that represents the integration of a function over a three-dimensional region, commonly used in fields such as physics, engineering, and multivariable calculus. It extends the concept of a single or double integral to account for volume, often appearing in theorems for flux, divergence, and three-dimensional vector fields. The symbol itself features three integral signs placed closely together, visually indicating the triple nature of the operation.
General Properties
| Code Point | U+222D |
| Version Added | 1.1 |
| Name | Triple Integral |
| Block | Mathematical Operators |
| General Category | Math Symbol |
| Canonical Combining Class | Not Reordered |
| Bidirectional Class | Other Neutral |
| Mirrored | Yes |
| Decomposition Type | Compat |
| Decomposition Mapping | "∫" U+222B Integral "∫" U+222B Integral "∫" U+222B Integral |
Encodings
| HTML Decimal Encoding | ∭ |
| HTML Hex Encoding | ∭ |
| UTF-8 Encoding | 0xE2 0x88 0xAD |
| UTF-16 Encoding | 0x222D |
| UTF-32 Encoding | 0x0000222D |
| C/C++/Java Escape | \u222d |
Unicode Properties
| NFC Quick Check | Yes |
| NFD Quick Check | Yes |
| Numeric Type | None |
| Numeric Value | NaN |
| Line Break | Alphabetic |
| Changes When NFKC Casefolded | Yes |
| NFKC Casefold | "∫" U+222B Integral "∫" U+222B Integral "∫" U+222B Integral |
| NFKC Simple Casefold | "∫" U+222B Integral "∫" U+222B Integral "∫" U+222B Integral |
| Script | Common |
| Script Extensions | Common |
| Indic Syllabic Category | Other |
| Pattern Syntax | Yes |
| Math | Yes |
| Vertical Orientation | Rotated |
| Grapheme Base | Yes |
| Grapheme Cluster Break | Other |
| Word Break | Other |
| Sentence Break | Other |