U+1D70F "𝜏" Mathematical Italic Small Tau Unicode Character

Unicode Version 17.0

𝜏

U+1D70F "𝜏" Mathematical Italic Small Tau is a specialized typographic symbol representing the Greek letter tau in a slanted, italicized form, designed for use in mathematical and scientific notation. It belongs to the Mathematical Alphanumeric Symbols block, which was introduced to ensure that italic Greek letters are distinct from ordinary text characters, preventing formatting conflicts. This character is commonly employed to denote physical constants like the elementary particle's lifetime, shear stress in engineering, torque in physics, and various parameters in statistics and number theory. Its inclusion in Unicode allows for precise rendering in digital documents, ensuring that mathematical expressions display correctly across different platforms and fonts.

General Properties

Code Point U+1D70F
Version Added 3.1
Name Mathematical Italic 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 0x9C 0x8F
UTF-16 Encoding 0xD835 0xDF0F
UTF-32 Encoding 0x0001D70F
C/C++/Java Escape \ud835\udf0f

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