U+1D73D "𝜽" Mathematical Bold Italic Small Theta Unicode Character

Unicode Version 17.0

𝜽

U+1D73D "𝜽" Mathematical Bold Italic Small Theta is a typographic variant of the Greek letter theta, designed for use in mathematical and scientific notation where a distinct, stylized symbol is needed to represent variables or specific constants, such as an angle in geometry or a parameter in statistics. It belongs to the Mathematical Alphanumeric Symbols block, which provides a range of letterforms in bold, italic, and bold-italic styles to prevent confusion with ordinary text and to ensure clarity in complex equations. This character is typically rendered in a serif or sans-serif font that combines both bold weight and italic slant, preserving the traditional shape of theta while distinguishing it from other symbols like the plain theta (θ) or the cursive variant (ϑ). Its inclusion in Unicode supports precise communication in academic and technical documents across different software platforms and fonts.

General Properties

Code Point U+1D73D
Version Added 3.1
Name Mathematical Bold Italic Small Theta
Block Mathematical Alphanumeric Symbols
General Category Lowercase Letter
Canonical Combining Class Not Reordered
Bidirectional Class Left To Right
Decomposition Type Font
Decomposition Mapping "θ" U+03B8 Greek Small Letter Theta

Encodings

HTML Decimal Encoding 𝜽
HTML Hex Encoding 𝜽
UTF-8 Encoding 0xF0 0x9D 0x9C 0xBD
UTF-16 Encoding 0xD835 0xDF3D
UTF-32 Encoding 0x0001D73D
C/C++/Java Escape \ud835\udf3d

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 "θ" U+03B8 Greek Small Letter Theta
NFKC Simple Casefold "θ" U+03B8 Greek Small Letter Theta
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