Mathematical Bold Italic Small I 𝒊
Visual Description: The symbol appears as a small i with bold weight and a slanted, italic form. Its strokes are thicker than standard type, and the dot sits clearly above the stem. It looks like a friendly letter with emphasis, designed to stand out in mathematical text alongside other bold italic glyphs.
Meaning & Usage: In math, this glyph functions as a variable form or index indicator, not a number by itself. It signals emphasis or a named quantity within formulas. In digital math editors and calculators, it helps writers keep symbols visually distinct.
Historical Background: The bold italic variant grew from typographic systems that separate mathematical notation from regular text. Designers created bold and italic forms to mark variables, vectors, and labels without altering the base alphabet. Across fonts and platforms, these glyphs broaden the palette for clear notation in complex equations.
Practical Use: In formulas, the bold italic i marks a variable or index and pairs with calculators or software that support math fonts. Quick UI controls let you insert this and other symbols, switch between operations, or compare values with tidy visual cues. It helps keep interfaces readable during rapid calculations and teaching.
See our category page for related symbols.
Look‑alikes: i (U+69).
Need styled alternatives? Try the Fancy Text tool.
Confusables
Technical details
- Codepoint:
U+1D48A - General Category:
Ll - Age:
3.1 - Bidi Class:
L - Decomposition:
<font> 0069 - Block:
Mathematical Alphanumeric Symbols - Script:
Common - UTF-8:
F0 9D 92 8A - UTF-16:
D835 DC8A - UTF-32:
0001D48A - HTML dec:
𝒊 - HTML hex:
𝒊 - JS escape:
\u{1D48A} - Python \N{}:
\N{MATHEMATICAL BOLD ITALIC SMALL I} - Python \U:
\U0001D48A - URL-encoded:
%F0%9D%92%8A - CSS escape:
\1D48A
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+1D48A or a built‑in character picker.
HTML: use the numeric entity 풊 (hex) or 풊 (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.