Mathematical Bold Fraktur Capital U 𝖀

Visual Description: This character is a capital U drawn in a bold Fraktur style. The shape is angular, with strong strokes and decorative curves that signal a formal, old-fashioned tone. In math displays it looks like a regular Latin U but with a distinctive weight. It belongs to a family of stylized letters used in figures and labels.

Meaning & Usage: Meaning varies by context. It is not tied to a universal symbol; it is a style choice to distinguish objects, families of functions, or special constants. In teaching and textbooks it helps separate bold ideas from plain letters. In digital math editors you can apply the style to emphasize a variable.

Historical Background: Historically, mathematical alphabets used different fonts to convey meaning. Bold and italic forms helped readers track operations and scope. The Fraktur style appears in older printing traditions and later found new life in Unicode as a decorative option for math notation. The goal is clear distinction without changing the underlying value.

Practical Use: In practice, you might see or input this character through a font picker or a math symbol panel. Quick UI controls let you apply the Fraktur style to a letter, switch to another font, or compare two variables side by side. In calculators and editors, such styling supports emphasis and visual grouping in formulas.

See our category page for related symbols.

Look‑alikes: U (U+55).

Need styled alternatives? Try the Fancy Text tool.