Mathematical Bold Script Capital C 𝓒

Visual Description: The symbol is a bold, calligraphic capital C with flowing curves. It sits with thick strokes and elegant loops, like handwriting drawn with a broad pen. The shape feels both decorative and legible in math text. It contrasts with plain letters by its smooth, sweeping form. It pairs well with other math symbols.

Meaning & Usage: In math, the bold script C marks a special quantity or constant, not a generic variable. It signals emphasis and distinction from ordinary letters. Use it in formulas, function names, and labeled drawings. In interfaces, this style often names constants for quick reference. It also helps explain context for readers.

Historical Background: The bold script appearance grew from calligraphy-inspired styles used to differentiate expressions in early typesetting. Designers and mathematicians adopted decorative forms to separate constants, sets, or named objects from ordinary letters. In digital forms, these scripts became font variants that preserve legibility while adding character. This helps new learners recognize style choices.

Practical Use: In formulas and calculators, use bold script to highlight constants or special quantities. Quick UI controls switch between normal and script fonts, or toggle emphasis on a value for comparison. In diagrams and reports, this symbol helps readers spot important measurements without crowding text. And supports quick visual comparisons.

See our category page for related symbols.

Look‑alikes: C (U+43).

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