Mathematical Italic Small J 𝑗
Visual Description: A slender mathematical italic small j appears slanted. It has a rounded bowl and a dot above. The tail curves gently below. The form stands out against upright text. In a UI it marks a variable, not a fixed value. It resembles other italic letters in proportion.
Meaning & Usage: In formulas, j functions as a variable name. It can stand for an index, a coordinate, or an unknown. Designers use the italic form to separate variables from operators. In calculators and math editors, toggling to italic helps readability and quick comparisons between terms and results.
Historical Background: Mathematical italics grew from the need to distinguish symbols in printed formulas. The idea spread to digital fonts as math notation moved onto screens. A dedicated block for alphanumeric symbols later encoded many variants, including the italic small j. This evolution supports clear notation across tools and interfaces.
Practical Use: Use the italic j to name a variable in quick UI controls. In a formula builder or calculator, keep a consistent style to help users scan terms. Use previews and switches to compare j against other variables or constants. The goal is fast, readable operations and measurements.
See our category page for related symbols.
Look‑alikes: j (U+6A).
Need styled alternatives? Try the Fancy Text tool.
Confusables
Technical details
- Codepoint:
U+1D457 - General Category:
Ll - Age:
3.1 - Bidi Class:
L - Decomposition:
<font> 006A - Block:
Mathematical Alphanumeric Symbols - Script:
Common - UTF-8:
F0 9D 91 97 - UTF-16:
D835 DC57 - UTF-32:
0001D457 - HTML dec:
𝑗 - HTML hex:
𝑗 - JS escape:
\u{1D457} - Python \N{}:
\N{MATHEMATICAL ITALIC SMALL J} - Python \U:
\U0001D457 - URL-encoded:
%F0%9D%91%97 - CSS escape:
\1D457
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+1D457 or a built‑in character picker.
HTML: use the numeric entity 푗 (hex) or 푗 (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.