Mathematical Italic Capital J 𝐽
Visual Description: The character is a capital J in mathematical italic style. It is slanted to the right and has a light, fluid stroke. The top curves gently, and the tail dips below the baseline. In math typesetting, it looks more calligraphic than a plain J. It pairs well with surrounding symbols and numbers.
Meaning & Usage: It marks a variable or a coefficient in formulas. As a capital J, it can denote a quantity, a function input, or a matrix element. In calculators, J appears in formulas after typing an expression. The italic style signals math context, not text.
Historical Background: Historically, mathematical styles included italics to distinguish variables from ordinary words. Printed math books adopted slanted letters to save space and emphasize symbols. The practice evolved with typesetting systems and digital fonts. This J follows that tradition by staying legible in formulas.
Practical Use: In practice, the J helps separate math notation from text. Users see it in formulas, equations, and interfaces. In calculators and editors, you may adjust size, slant, or weight with quick controls. It signals a mathematical quantity and keeps comparisons clear in charts and graphs.
See our category page for related symbols.
Look‑alikes: J (U+4A).
Need styled alternatives? Try the Fancy Text tool.
Confusables
Technical details
- Codepoint:
U+1D43D - General Category:
Lu - Age:
3.1 - Bidi Class:
L - Decomposition:
<font> 004A - Block:
Mathematical Alphanumeric Symbols - Script:
Common - UTF-8:
F0 9D 90 BD - UTF-16:
D835 DC3D - UTF-32:
0001D43D - HTML dec:
𝐽 - HTML hex:
𝐽 - JS escape:
\u{1D43D} - Python \N{}:
\N{MATHEMATICAL ITALIC CAPITAL J} - Python \U:
\U0001D43D - URL-encoded:
%F0%9D%90%BD - CSS escape:
\1D43D
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+1D43D or a built‑in character picker.
HTML: use the numeric entity 퐽 (hex) or 퐽 (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.