U+1D70E "𝜎" Mathematical Italic Small Sigma Unicode Character

U+1D70E "𝜎" Mathematical Italic Small Sigma is a specialized typographic symbol used primarily in mathematical and scientific notation to represent the specific italicized form of the lowercase Greek letter sigma. It is part of the Mathematical Alphanumeric Symbols block, designed to ensure clear and unambiguous distinction from the regular Greek alphabet in contexts such as variable names, statistical formulae where the sigma often denotes standard deviation, or in fields like physics and engineering. This character allows authors and typesetting systems to preserve semantic meaning and stylistic consistency, especially when italicization is required for mathematical variables while maintaining plain Greek letters for other uses.

General Properties

Code Point	U+1D70E
Version Added	3.1
Name	Mathematical Italic Small Sigma
Block	Mathematical Alphanumeric Symbols
General Category	Lowercase Letter
Canonical Combining Class	Not Reordered
Bidirectional Class	Left To Right
Decomposition Type	Font
Decomposition Mapping	"σ" U+03C3 Greek Small Letter Sigma

Encodings

HTML Decimal Encoding	𝜎
HTML Hex Encoding	𝜎
UTF-8 Encoding	0xF0 0x9D 0x9C 0x8E
UTF-16 Encoding	0xD835 0xDF0E
UTF-32 Encoding	0x0001D70E
C/C++/Java Escape	\ud835\udf0e

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	"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	Lower