𝒳 Mathematical Script Capital X

Codes

JavaScript and JSON strings store text as UTF-16, so this character takes two code units (a surrogate pair) and "𝒳".length is 2. Python 3 strings count code points, so its length there is 1.

Properties

Decomposition

MATHEMATICAL SCRIPT CAPITAL X has a compatibility decomposition (font) to the sequence below. NFKC and NFKD normalisation replace it with that sequence, which can change how text looks, so use them for search, not for storage.

• X U+0058 Latin Capital Letter X

Nearby in Mathematical Alphanumeric Symbols

• 𝒪 U+1D4AA Mathematical Script Capital O
• 𝒫 U+1D4AB Mathematical Script Capital P
• 𝒬 U+1D4AC Mathematical Script Capital Q
• 𝒮 U+1D4AE Mathematical Script Capital S
• 𝒯 U+1D4AF Mathematical Script Capital T
• 𝒰 U+1D4B0 Mathematical Script Capital U
• 𝒱 U+1D4B1 Mathematical Script Capital V
• 𝒲 U+1D4B2 Mathematical Script Capital W
• 𝒴 U+1D4B4 Mathematical Script Capital Y
• 𝒵 U+1D4B5 Mathematical Script Capital Z
• 𝒶 U+1D4B6 Mathematical Script Small A
• 𝒷 U+1D4B7 Mathematical Script Small B
• 𝒸 U+1D4B8 Mathematical Script Small C
• 𝒹 U+1D4B9 Mathematical Script Small D
• 𝒻 U+1D4BB Mathematical Script Small F
• 𝒽 U+1D4BD Mathematical Script Small H

All 997 characters: Mathematical Alphanumeric Symbols.

Official reference

• Unicode code chart: Mathematical Alphanumeric Symbols (PDF, unicode.org)

Questions people ask

What is the HTML code for 𝒳?

Use the named entity 𝒳, or 𝒳 (decimal) or 𝒳 (hex).

What is the UTF-8 encoding of U+1D4B3?

F0 9D 92 B3 (hex), 4 bytes. In a URL it is %F0%9D%92%B3.

How do I write U+1D4B3 in JavaScript or Python?

JavaScript: \u{1D4B3} or \uD835\uDCB3. Python: \U0001D4B3.

Source

Unicode Character Database 18.0.0 (Unicode License v3); HTML entity names from the WHATWG HTML Standard (CC BY 4.0). The encodings above are computed from the code point and checked against Python's encoders. How the character looks depends on your fonts.

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