Mathematical Bold Script Capital F 𝓕

Visual Description: This glyph is a bold script capital F. It has looping strokes and a rounded, elegant shape. The lines are thick and smooth, making it stand out on the page. It contrasts with plain letters and other math symbols. It often signals a special function or family.

Meaning & Usage: In math, this style marks a named object. It can denote a function family, a set, or a variable used for emphasis. People use it in formulas, notes, and textbooks. In software, you may choose a bold script font to highlight ideas or quick comparisons. It signals elegance as well as distinction.

Historical Background: This style grew from calligraphic practice in typesetting. It emerged as fonts were extended to mark special mathematics symbols. Over time, bold script variants were added to help readers distinguish functions, collections, or variables. The idea is to provide visual cues without changing underlying meaning.

Practical Use: In practice, you insert it via a font choice or a math editor. Calculators and CAS usually treat it as formatting, not a separate operation. On screens you can switch styles with a quick UI control to apply bold script to a symbol for emphasis or comparison. It helps readability without altering meaning.

See our category page for related symbols.

Look‑alikes: F (U+46).

Need styled alternatives? Try the Fancy Text tool.