UnicodeCharactercom
๐•†
U+1D546 ยท MATHEMATICAL DOUBLE-STRUCK CAPITAL O

Mathematical Double-Struck Capital O

  • CodepointU+1D546
  • NameMATHEMATICAL DOUBLE-STRUCK CAPITAL O
  • Decimal120134
  • BlockMathematical Alphanumeric Symbols (U+1D400โ€“U+1D7FF)
  • Plane1 โ€” Supplementary Multilingual Plane
  • ScriptCommon
  • CategoryLu โ€” Uppercase Letter
  • Unicode version3.1 (2001)
  • Bidi classL โ€” Left-to-Right
  • Combining class0
  • East Asian widthN โ€” Neutral
  • MirroredNo

About this character

U+1D546 (๐•†) is MATHEMATICAL DOUBLE-STRUCK CAPITAL O, an uppercase letter in the Mathematical Alphanumeric Symbols block. Its script is Common: it is shared by many writing systems rather than belonging to one. It was added in Unicode 3.1 (2001).

It is a font variant of U+004F O (compatibility decomposition <font>). NFC and NFD leave it alone, but NFKC and NFKD replace it with U+004F O. Search engines, identifier checks and username systems that apply NFKC will treat the two as the same text.

How to type ๐•†

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Encodings & escapes

UTF-8 encoder โ†’
UTF-8F0 9D 95 864 bytes
UTF-16D835 DD46surrogate pair
UTF-320001D5464 bytes
HTML named&Oopf;named character reference
HTML decimal&#120134;
HTML hex&#x1D546;
CSS\1D546in content: "โ€ฆ"
JavaScript\u{1D546}ES2015+
JavaScript\uD835\uDD46surrogate pair
JSON\uD835\uDD46
Python\U0001D546
Python\N{MATHEMATICAL DOUBLE-STRUCK CAPITAL O}by name
Java / C#\uD835\uDD46
C / C++\U0001D546universal character name
Rust / Swift / PHP\u{1D546}
Go\U0001D546
Ruby\u{1D546}
Excel / Sheets=UNICHAR(120134)
URL-encoded%F0%9D%95%86percent-encoded UTF-8
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Normalization forms

Normalizer โ†’
NFCunchanged
NFDunchanged
NFKCU+004F O
NFKDU+004F O
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Looks similar

Characters that Unicodeโ€™s security data (UTS #39 confusables) lists as visually confusable with this one. Useful for spotting lookalike spoofing in URLs and usernames.

U+00300Digit Zero U+004FOLatin Capital Letter O U+039FฮŸGreek Capital Letter Omicron U+041EะžCyrillic Capital Letter O U+0555ี•Armenian Capital Letter Oh U+3007ใ€‡Ideographic Number Zero U+FF2F๏ผฏFullwidth Latin Capital Letter O U+1D40E๐ŽMathematical Bold Capital O U+1D442๐‘‚Mathematical Italic Capital O U+1D476๐‘ถMathematical Bold Italic Capital O U+1D4AA๐’ชMathematical Script Capital O U+1D4DE๐“žMathematical Bold Script Capital O U+1D512๐”’Mathematical Fraktur Capital O U+1D57A๐•บMathematical Bold Fraktur Capital O U+1D5AE๐–ฎMathematical Sans-Serif Capital O U+1D5E2๐—ขMathematical Sans-Serif Bold Capital O
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Nearby in Mathematical Alphanumeric Symbols

All in block โ†’
U+1D540๐•€Mathematical Double-Struck Capital I U+1D541๐•Mathematical Double-Struck Capital J U+1D542๐•‚Mathematical Double-Struck Capital K U+1D543๐•ƒMathematical Double-Struck Capital L U+1D544๐•„Mathematical Double-Struck Capital M U+1D54A๐•ŠMathematical Double-Struck Capital S U+1D54B๐•‹Mathematical Double-Struck Capital T U+1D54C๐•ŒMathematical Double-Struck Capital U