U+1D74D "𝝍" Mathematical Bold Italic Small Psi Unicode Character

Unicode Version 17.0

𝝍

U+1D74D "𝝍" Mathematical Bold Italic Small Psi is a typographic variant of the Greek letter psi (ψ) designed for use in mathematical and scientific notation, where it often represents wave functions in quantum mechanics, the digamma function in mathematics, or the golden ratio conjugate in certain contexts. It belongs to the Mathematical Alphanumeric Symbols block, which was introduced in Unicode 3.1 to provide distinct, style-specific glyphs for letters so that authors can clearly denote variables, operators, and constants without relying on font formatting. This particular character combines a bold weight with an italic slant, making it visually distinct from its plain, bold, or italic counterparts and ideal for emphasizing a specific symbolic meaning in equations or technical documents.

General Properties

Code Point U+1D74D
Version Added 3.1
Name Mathematical Bold Italic Small Psi
Block Mathematical Alphanumeric Symbols
General Category Lowercase Letter
Canonical Combining Class Not Reordered
Bidirectional Class Left To Right
Decomposition Type Font
Decomposition Mapping "ψ" U+03C8 Greek Small Letter Psi

Encodings

HTML Decimal Encoding 𝝍
HTML Hex Encoding 𝝍
UTF-8 Encoding 0xF0 0x9D 0x9D 0x8D
UTF-16 Encoding 0xD835 0xDF4D
UTF-32 Encoding 0x0001D74D
C/C++/Java Escape \ud835\udf4d

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 "ψ" U+03C8 Greek Small Letter Psi
NFKC Simple Casefold "ψ" U+03C8 Greek Small Letter Psi
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