U+1D6D5 "𝛕" Mathematical Bold Small Tau Unicode Character
Unicode Version 17.0
𝛕
U+1D6D5 "𝛕" Mathematical Bold Small Tau is a typographical variant of the Greek letter tau, specifically designed for use in mathematical and scientific notation where a bold weight is needed to distinguish variables, constants, or operators in equations. It belongs to the Mathematical Alphanumeric Symbols block, which provides distinct stylistic forms of standard letters to avoid ambiguity in technical texts. This character represents the lowercase tau in a bold serif style, often employed in fields like physics, engineering, and statistics to denote time constants, shear stress, or the golden ratio conjugate.
General Properties
| Code Point | U+1D6D5 |
| Version Added | 3.1 |
| Name | Mathematical Bold Small Tau |
| Block | Mathematical Alphanumeric Symbols |
| General Category | Lowercase Letter |
| Canonical Combining Class | Not Reordered |
| Bidirectional Class | Left To Right |
| Decomposition Type | Font |
| Decomposition Mapping | "τ" U+03C4 Greek Small Letter Tau |
Encodings
| HTML Decimal Encoding | 𝛕 |
| HTML Hex Encoding | 𝛕 |
| UTF-8 Encoding | 0xF0 0x9D 0x9B 0x95 |
| UTF-16 Encoding | 0xD835 0xDED5 |
| UTF-32 Encoding | 0x0001D6D5 |
| C/C++/Java Escape | \ud835\uded5 |
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 | "τ" U+03C4 Greek Small Letter Tau |
| NFKC Simple Casefold | "τ" U+03C4 Greek Small Letter Tau |
| 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 |