U+1D489 "𝒉" Mathematical Bold Italic Small H Unicode Character

U+1D489 "𝒉" Mathematical Bold Italic Small H is a specific typographic variant of the lowercase letter 'h' used primarily in mathematical and scientific notation to denote variables, vectors, or constants in a bold and italicized format. This character belongs to the Mathematical Alphanumeric Symbols block, which was introduced to provide distinct, unambiguous symbols for complex formulas where plain text or simple styling might cause confusion. It combines the weight of bold type with the slant of italics, making it particularly useful in fields like physics, engineering, and advanced mathematics for representing quantities such as Planck's constant or other specialized terms within a coherent, styled expression.

General Properties

Code Point	U+1D489
Version Added	3.1
Name	Mathematical Bold Italic Small H
Block	Mathematical Alphanumeric Symbols
General Category	Lowercase Letter
Canonical Combining Class	Not Reordered
Bidirectional Class	Left To Right
Decomposition Type	Font
Decomposition Mapping	"h" U+0068 Latin Small Letter H

Encodings

HTML Decimal Encoding	𝒉
HTML Hex Encoding	𝒉
UTF-8 Encoding	0xF0 0x9D 0x92 0x89
UTF-16 Encoding	0xD835 0xDC89
UTF-32 Encoding	0x0001D489
C/C++/Java Escape	\ud835\udc89

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	"h" U+0068 Latin Small Letter H
NFKC Simple Casefold	"h" U+0068 Latin Small Letter H
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