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U+1D523 · Mathematical Fraktur Small F · Mathematical Alphanumeric Symbols · Common

Mathematical Fraktur Small F 𝔣

Visual Description: The symbol looks like a stylized f with decorative lines. It has a tall stem and a curved bowl, shown in Fraktur styling. The design keeps a legible form even in small print. In formulas, it reads like a distinctive variable. In editors, it stays clear at mixed sizes. UI previews show the Fraktur look clearly.

Meaning & Usage: It is often used as a variable or as a function name in math and logic. The Fraktur style signals a special set or a differing role from plain letters. In quick calculators, the symbol marks a parameter or a placeholder. Some editors offer a Fraktur button or hotkey. This helps quick comparisons.

Historical Background: Fraktur styling comes from typographic traditions that used ornate letters in print. The small f variant appears in many mathematical fonts as a way to signal a special idea. In digital work, fonts map the style to the same letter, keeping the math consistent and readable.

Practical Use: In notes and software, you can apply Fraktur to a symbol by selecting it and choosing a font style. In calculators, notebooks, and editors, the mark helps separate types of variables or constants. Quick UI controls may include a style toggle, a color cue, or a symbol palette. Use it for clarity.

See our category page for related symbols.

Look‑alikes: f (U+66).

Need styled alternatives? Try the Fancy Text tool.

Confusables

Technical details
  • Codepoint: U+1D523
  • General Category: Ll
  • Age: 3.1
  • Bidi Class: L
  • Decomposition: <font> 0066
  • Block: Mathematical Alphanumeric Symbols
  • Script: Common
  • UTF-8: F0 9D 94 A3
  • UTF-16: D835 DD23
  • UTF-32: 0001D523
  • HTML dec: &#120099;
  • HTML hex: &#x1D523;
  • JS escape: \u{1D523}
  • Python \N{}: \N{MATHEMATICAL FRAKTUR SMALL F}
  • Python \U: \U0001D523
  • URL-encoded: %F0%9D%94%A3
  • CSS escape: \1D523
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+1D523 or a built‑in character picker.

HTML: use the numeric entity (hex) or (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.