Mathematical Bold Fraktur Capital I 𝕴
Visual Description: The character appears as a bold Fraktur form of the capital I. It shows thick, angular strokes with blackletter flair and decorative edges. In math layouts it stands out from a standard I, giving a ceremonial or classical look. It is a stylistic variant rather than a base symbol.
Meaning & Usage: In mathematical typography, bold Fraktur I is a stylistic variant used to distinguish certain objects or denote emphasis. It is not tied to a universal operation. Authors and fonts may reserve it for special sets, identities, or historical works. In digital editors, it remains optional and decorative.
Historical Background: The Fraktur style is part of a larger blackletter tradition used in printing and typography to convey a classic or formal mood. In math, a dedicated set of bold variants appeared to support distinct letters without changing meaning. The design choices emphasize texture, legibility, and stylistic nuance.
Practical Use: In formulas, this glyph can serve as a decorative indicator or a typographic variant for a particular object. Calculators and math editors may offer a quick UI control to switch font families or insert special symbols. Use sparingly and verify readability when alternating with standard letters.
See our category page for related symbols.
Look‑alikes: l (U+6C).
Need styled alternatives? Try the Fancy Text tool.
Confusables
Technical details
- Codepoint:
U+1D574 - General Category:
Lu - Age:
3.1 - Bidi Class:
L - Decomposition:
<font> 0049 - Block:
Mathematical Alphanumeric Symbols - Script:
Common - UTF-8:
F0 9D 95 B4 - UTF-16:
D835 DD74 - UTF-32:
0001D574 - HTML dec:
𝕴 - HTML hex:
𝕴 - JS escape:
\u{1D574} - Python \N{}:
\N{MATHEMATICAL BOLD FRAKTUR CAPITAL I} - Python \U:
\U0001D574 - URL-encoded:
%F0%9D%95%B4 - CSS escape:
\1D574
How to type / insert
Fast copy: click the Copy button near the top of this page.
By codepoint: in many editors and IDEs, you can insert via the Unicode code U+1D574 or a built‑in character picker.
HTML: use the numeric entity 해 (hex) or 해 (decimal) when an HTML entity is needed.
Compatibility & troubleshooting
Font support: if the symbol does not render, the current font likely lacks this codepoint. Choose a font with broad Unicode coverage or allow a fallback font.
Web pages: ensure your CSS font stack includes a general fallback; avoid relying on images for common symbols to preserve accessibility and copyability.