Mathematical Fraktur Capital F 𝔉

Visual Description: The symbol is a tall, stylized letter F with bold strokes and decorative curves. Its lines combine thick and thin segments, giving a formal, old style look. The glyph sits upright and compact, with crisp edges that stand out in text and math formulas. It resembles a calligraphic ornament rather than a plain letter.

Meaning & Usage: It is used to represent ideas or objects in math and theory, not as a common variable. In documents, authors use it to mark a special set, a family of objects, or a distinguished function. It signals emphasis and distinction, helping readers notice a particular symbol among many.

Historical Background: The Fraktur style originated in traditional Blackletter typography and was embraced by early print and manuscript work. In mathematics, this decorative type is included in a family of stylized symbols. It serves as a visual cue to separate certain items from regular letters, without changing their meaning.

Practical Use: In calculations and formulas, you might see this F used as a label for a function or a subset. In user interfaces, quick controls can toggle font styles or swap between plain and Fraktur to compare how notation affects readability. It adds visual variety while keeping the math clear.

See our category page for related symbols.

Look‑alikes: F (U+46).

Need styled alternatives? Try the Fancy Text tool.