U+1D7B1 "𝞱" Mathematical Sans-Serif Bold Italic Small Theta Unicode Character

U+1D7B1 "𝞱" Mathematical Sans-Serif Bold Italic Small Theta is a typographic glyph designed for use in mathematical and scientific notation, representing the Greek letter theta in a sans-serif, bold, and italic style. It belongs to the Mathematical Alphanumeric Symbols block, which was created to provide distinct, unambiguous symbols for variables and constants in technical documents, avoiding the stylistic confusion that can arise from using ordinary Greek letters in mixed fonts. This specific variant allows authors to denote a particular mathematical entity, such as an angle or a parameter, while clearly differentiating it from other thetas or standard text, thereby enhancing clarity in fields like calculus, geometry, and physics.

General Properties

Code Point	U+1D7B1
Version Added	3.1
Name	Mathematical Sans-Serif 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 0x9E 0xB1
UTF-16 Encoding	0xD835 0xDFB1
UTF-32 Encoding	0x0001D7B1
C/C++/Java Escape	\ud835\udfb1

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