U+1D72E "𝜮" Mathematical Bold Italic Capital Sigma Unicode Character

Unicode Version 17.0

𝜮

U+1D72E "𝜮" Mathematical Bold Italic Capital Sigma is a typographic variant of the Greek capital letter Sigma, specifically designed for use in mathematical and scientific notation where a bold italic style is required to denote a vector, matrix, tensor, or other specialized symbolic quantity. This character belongs to the Mathematical Alphanumeric Symbols block, which was introduced to provide distinct, style-specific glyphs that avoid ambiguity with standard text characters in technical documents. Unlike the regular Greek capital Sigma (∑ or Σ), this version combines a bold weight with an italic slant, allowing it to serve as a clear visual cue in equations and formulas, particularly in fields like physics, engineering, and linear algebra. Its inclusion in Unicode ensures that mathematical texts can preserve precise formatting across different platforms and fonts.

General Properties

Code Point U+1D72E
Version Added 3.1
Name Mathematical Bold Italic Capital Sigma
Block Mathematical Alphanumeric Symbols
General Category Uppercase Letter
Canonical Combining Class Not Reordered
Bidirectional Class Left To Right
Decomposition Type Font
Decomposition Mapping "Σ" U+03A3 Greek Capital Letter Sigma

Encodings

HTML Decimal Encoding 𝜮
HTML Hex Encoding 𝜮
UTF-8 Encoding 0xF0 0x9D 0x9C 0xAE
UTF-16 Encoding 0xD835 0xDF2E
UTF-32 Encoding 0x0001D72E
C/C++/Java Escape \ud835\udf2e

Unicode Properties

NFC Quick Check Yes
NFD Quick Check Yes
Numeric Type None
Numeric Value NaN
Line Break Alphabetic
Uppercase Yes
Cased Yes
Changes When NFKC Casefolded Yes
NFKC Casefold "σ" U+03C3 Greek Small Letter Sigma
NFKC Simple Casefold "σ" U+03C3 Greek Small Letter Sigma
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 Upper